<XBRL>
<?xml version="1.0" encoding="ASCII"?>
<!-- Prepared by IBM Cognos FSR v6.7.2.72 using Fujitsu Interstage XWand -->
<linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/instance http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance">
    <roleRef roleURI="http://www.comcast.com/role/StatementConsolidatedBalanceSheet" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#StatementConsolidatedBalanceSheet" />
    <roleRef roleURI="http://www.comcast.com/role/StatementConsolidatedStatementOfIncome" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_ConsolidatedStatementOfIncome" />
    <roleRef roleURI="http://www.comcast.com/role/StatementConsolidatedStatementOfCashFlows" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#StatementConsolidatedStatementOfCashFlows" />
    <roleRef roleURI="http://www.comcast.com/role/StatementConsolidatedStatementOfComprehensiveIncome" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_ConsolidatedStatementOfComprehensiveIncome" />
    <roleRef roleURI="http://www.comcast.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_EarningsPerShareDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureInvestmentsDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_InvestmentsDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureInvestmentsFairValueMethodInvestmentsDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_InvestmentsFairValueMethodInvestmentsDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureNoncontrollingInterestsDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#DisclosureNoncontrollingInterestsDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureIncomeTaxesFederalStatutoryDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#DisclosureIncomeTaxesFederalStatutoryDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureIncomeTaxesComponentsOfNetDeferredTaxLiabilityDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#DisclosureIncomeTaxesComponentsOfNetDeferredTaxLiabilityDetails" />
    <roleRef roleURI="http://www.comcast.com/role/InvestmentsInvestmentIncomeLossNetDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_InvestmentsInvestmentIncomeLossNetDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureFilmAndTelevisionCostsFilmAndTelevisionCostsDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_FilmAndTelevisionCostsFilmAndTelevisionCostsDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureSupplementalFinancialInformationReceivablesDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_SupplementalFinancialInformationReceivablesDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureAcquisitionsNBCUniversalPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_AcquisitionsNBCUniversalPurchasePriceAllocationDetails" />
    <roleRef roleURI="http://www.comcast.com/role/DisclosureAcquisitionsUniversalOrlandoPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_AcquisitionsUniversalOrlandoPurchasePriceAllocationDetails" />
    <roleRef roleURI="http://www.comcast.com/role/AcquisitionsTransactionRelatedExpensesDetails" xlink:type="simple" xlink:href="cmcsa-20121231.xsd#cmcsa_ELRID_AcquisitionsTransactionRelatedExpensesDetails" />
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/StatementConsolidatedBalanceSheet">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_89" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_90" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_89" xlink:to="Locator_us-gaap_AssetsCurrent_90" order="9.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_105" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="Locator_us-gaap_CashAndCashEquivalentsAtCarryingValue_106" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_105" xlink:to="Locator_us-gaap_CashAndCashEquivalentsAtCarryingValue_106" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_107" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_108" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_107" xlink:to="Locator_us-gaap_AccountsReceivableNetCurrent_108" order="5.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_109" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="Locator_us-gaap_DeferredTaxAssetsNetCurrent_110" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_109" xlink:to="Locator_us-gaap_DeferredTaxAssetsNetCurrent_110" order="7.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_111" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="Locator_us-gaap_OtherAssetsCurrent_112" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_111" xlink:to="Locator_us-gaap_OtherAssetsCurrent_112" order="8.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_113" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ProgrammingRightsCurrent" xlink:label="Locator_cmcsa_ProgrammingRightsCurrent_114" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_113" xlink:to="Locator_cmcsa_ProgrammingRightsCurrent_114" order="6.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_115" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShortTermInvestments" xlink:label="Locator_us-gaap_ShortTermInvestments_116" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_115" xlink:to="Locator_us-gaap_ShortTermInvestments_116" order="4.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_91" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermInvestments" xlink:label="Locator_us-gaap_LongTermInvestments_92" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_91" xlink:to="Locator_us-gaap_LongTermInvestments_92" order="11.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_93" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentNet_94" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_93" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentNet_94" order="12.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_95" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IndefiniteLivedFranchiseRights" xlink:label="Locator_us-gaap_IndefiniteLivedFranchiseRights_96" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_95" xlink:to="Locator_us-gaap_IndefiniteLivedFranchiseRights_96" order="13.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_97" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Goodwill" xlink:label="Locator_us-gaap_Goodwill_98" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_97" xlink:to="Locator_us-gaap_Goodwill_98" order="14.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_99" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherIntangibleAssetsNet" xlink:label="Locator_us-gaap_OtherIntangibleAssetsNet_100" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_99" xlink:to="Locator_us-gaap_OtherIntangibleAssetsNet_100" order="15.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_101" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="Locator_us-gaap_OtherAssetsNoncurrent_102" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_101" xlink:to="Locator_us-gaap_OtherAssetsNoncurrent_102" order="16.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_103" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_FilmAndTelevisionCosts" xlink:label="Locator_cmcsa_FilmAndTelevisionCosts_104" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_103" xlink:to="Locator_cmcsa_FilmAndTelevisionCosts_104" order="10.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_117" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_118" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_117" xlink:to="Locator_us-gaap_LiabilitiesCurrent_118" order="26.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_131" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="Locator_us-gaap_AccountsPayableCurrent_132" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_131" xlink:to="Locator_us-gaap_AccountsPayableCurrent_132" order="20.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_133" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedSalariesCurrent" xlink:label="Locator_us-gaap_AccruedSalariesCurrent_134" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_133" xlink:to="Locator_us-gaap_AccruedSalariesCurrent_134" order="22.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_135" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrent_136" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_135" xlink:to="Locator_us-gaap_AccruedLiabilitiesCurrent_136" order="24.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_137" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DebtCurrent" xlink:label="Locator_us-gaap_DebtCurrent_138" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_137" xlink:to="Locator_us-gaap_DebtCurrent_138" order="25.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_139" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_AccruedParticipationsAndResidualsCurrent" xlink:label="Locator_cmcsa_AccruedParticipationsAndResidualsCurrent_140" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_139" xlink:to="Locator_cmcsa_AccruedParticipationsAndResidualsCurrent_140" order="21.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_141" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="Locator_us-gaap_DeferredRevenueCurrent_142" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_141" xlink:to="Locator_us-gaap_DeferredRevenueCurrent_142" order="23.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_119" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="Locator_us-gaap_LongTermDebtAndCapitalLeaseObligations_120" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_119" xlink:to="Locator_us-gaap_LongTermDebtAndCapitalLeaseObligations_120" order="27.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_121" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesNoncurrent_122" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_121" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesNoncurrent_122" order="28.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_123" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrent_124" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_123" xlink:to="Locator_us-gaap_OtherLiabilitiesNoncurrent_124" order="30.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_125" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount" xlink:label="Locator_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_126" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_125" xlink:to="Locator_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_126" order="32.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_127" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_128" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_127" xlink:to="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_128" order="42.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_143" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_144" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_143" xlink:to="Locator_us-gaap_StockholdersEquity_144" order="40.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_147" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="Locator_us-gaap_PreferredStockValue_148" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_147" xlink:to="Locator_us-gaap_PreferredStockValue_148" order="34.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_149" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="Locator_us-gaap_AdditionalPaidInCapital_150" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_149" xlink:to="Locator_us-gaap_AdditionalPaidInCapital_150" order="36.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_151" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="Locator_us-gaap_RetainedEarningsAccumulatedDeficit_152" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_151" xlink:to="Locator_us-gaap_RetainedEarningsAccumulatedDeficit_152" order="37.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_153" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="Locator_us-gaap_TreasuryStockValue_154" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_153" xlink:to="Locator_us-gaap_TreasuryStockValue_154" order="38.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_155" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_156" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_155" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_156" order="39.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_157" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CommonStockValue" xlink:label="Locator_us-gaap_CommonStockValue_158" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_157" xlink:to="Locator_us-gaap_CommonStockValue_158" order="35.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_145" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MinorityInterest" xlink:label="Locator_us-gaap_MinorityInterest_146" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_145" xlink:to="Locator_us-gaap_MinorityInterest_146" order="41.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_129" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="Locator_us-gaap_DeferredRevenueNoncurrent_130" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_129" xlink:to="Locator_us-gaap_DeferredRevenueNoncurrent_130" order="29.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/StatementConsolidatedStatementOfIncome">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_365" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_366" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_365" xlink:to="Locator_us-gaap_ProfitLoss_366" order="18.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_369" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_370" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_369" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_370" order="16.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_373" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_374" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_373" xlink:to="Locator_us-gaap_OperatingIncomeLoss_374" order="9.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_377" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Revenues" xlink:label="Locator_us-gaap_Revenues_378" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_377" xlink:to="Locator_us-gaap_Revenues_378" order="1.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_379" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_380" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_379" xlink:to="Locator_us-gaap_CostsAndExpenses_380" order="8.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_381" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Depreciation" xlink:label="Locator_us-gaap_Depreciation_382" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CostsAndExpenses_381" xlink:to="Locator_us-gaap_Depreciation_382" order="6.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_383" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="Locator_us-gaap_AmortizationOfIntangibleAssets_384" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CostsAndExpenses_383" xlink:to="Locator_us-gaap_AmortizationOfIntangibleAssets_384" order="7.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_385" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ProgrammingAndProductionCosts" xlink:label="Locator_cmcsa_ProgrammingAndProductionCosts_386" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CostsAndExpenses_385" xlink:to="Locator_cmcsa_ProgrammingAndProductionCosts_386" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_387" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_OtherOperatingAndAdministrative" xlink:label="Locator_cmcsa_OtherOperatingAndAdministrative_388" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CostsAndExpenses_387" xlink:to="Locator_cmcsa_OtherOperatingAndAdministrative_388" order="4.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_389" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarketingAndAdvertisingExpense" xlink:label="Locator_us-gaap_MarketingAndAdvertisingExpense_390" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CostsAndExpenses_389" xlink:to="Locator_us-gaap_MarketingAndAdvertisingExpense_390" order="5.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_375" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_376" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_375" xlink:to="Locator_us-gaap_NonoperatingIncomeExpense_376" order="15.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_391" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_392" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_391" xlink:to="Locator_us-gaap_InterestExpense_392" order="11.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_393" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_394" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_393" xlink:to="Locator_us-gaap_InvestmentIncomeNonoperating_394" order="12.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_395" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_396" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_395" xlink:to="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_396" order="13.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_397" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpense_398" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_397" xlink:to="Locator_us-gaap_OtherNonoperatingIncomeExpense_398" order="14.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_371" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_372" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_371" xlink:to="Locator_us-gaap_IncomeTaxExpenseBenefit_372" order="17.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_367" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_368" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_367" xlink:to="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_368" order="19.0" weight="-1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/StatementConsolidatedStatementOfCashFlows">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_479" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_480" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_479" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_480" order="17.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_485" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="Locator_us-gaap_DepreciationAndAmortization_486" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_485" xlink:to="Locator_us-gaap_DepreciationAndAmortization_486" order="4.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_487" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_AmortizationOfFilmAndTelevisionCosts" xlink:label="Locator_cmcsa_AmortizationOfFilmAndTelevisionCosts_488" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_487" xlink:to="Locator_cmcsa_AmortizationOfFilmAndTelevisionCosts_488" order="5.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_489" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="Locator_us-gaap_ShareBasedCompensation_490" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_489" xlink:to="Locator_us-gaap_ShareBasedCompensation_490" order="6.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_491" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_OtherNonCashIncomeExpense1" xlink:label="Locator_cmcsa_OtherNonCashIncomeExpense1_492" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_491" xlink:to="Locator_cmcsa_OtherNonCashIncomeExpense1_492" order="7.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_493" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_494" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_493" xlink:to="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_494" order="8.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_495" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityMethodInvestmentDividendsOrDistributions" xlink:label="Locator_us-gaap_EquityMethodInvestmentDividendsOrDistributions_496" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_495" xlink:to="Locator_us-gaap_EquityMethodInvestmentDividendsOrDistributions_496" order="9.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_497" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_GainLossOnInvestmentsAndNoncashOtherIncomeExpenseNet" xlink:label="Locator_cmcsa_GainLossOnInvestmentsAndNoncashOtherIncomeExpenseNet_498" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_497" xlink:to="Locator_cmcsa_GainLossOnInvestmentsAndNoncashOtherIncomeExpenseNet_498" order="10.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_499" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_500" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_499" xlink:to="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_500" order="11.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_501" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="Locator_us-gaap_IncreaseDecreaseInAccountsReceivable_502" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_501" xlink:to="Locator_us-gaap_IncreaseDecreaseInAccountsReceivable_502" order="13.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_503" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ChangeInFilmAndTelevisionCosts" xlink:label="Locator_cmcsa_ChangeInFilmAndTelevisionCosts_504" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_503" xlink:to="Locator_cmcsa_ChangeInFilmAndTelevisionCosts_504" order="14.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_505" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="Locator_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_506" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_505" xlink:to="Locator_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_506" order="15.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_507" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="Locator_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_508" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_507" xlink:to="Locator_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_508" order="16.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_509" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_510" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_509" xlink:to="Locator_us-gaap_ProfitLoss_510" order="2.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_481" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_482" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_481" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_482" order="26.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_511" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="Locator_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_512" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_511" xlink:to="Locator_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_512" order="19.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_513" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="Locator_us-gaap_PaymentsToAcquireIntangibleAssets_514" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_513" xlink:to="Locator_us-gaap_PaymentsToAcquireIntangibleAssets_514" order="20.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_515" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="Locator_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_516" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_515" xlink:to="Locator_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_516" order="21.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_517" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:label="Locator_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_518" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_517" xlink:to="Locator_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_518" order="22.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_519" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="Locator_us-gaap_PaymentsToAcquireInvestments_520" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_519" xlink:to="Locator_us-gaap_PaymentsToAcquireInvestments_520" order="24.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_521" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="Locator_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_522" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_521" xlink:to="Locator_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_522" order="25.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_523" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_EquityMethodInvestmentDividendsOrDistributionsIncludingReturnOfInvestment" xlink:label="Locator_cmcsa_EquityMethodInvestmentDividendsOrDistributionsIncludingReturnOfInvestment_524" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_523" xlink:to="Locator_cmcsa_EquityMethodInvestmentDividendsOrDistributionsIncludingReturnOfInvestment_524" order="23.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_483" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_484" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_483" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_484" order="37.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_525" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="Locator_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_526" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_525" xlink:to="Locator_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_526" order="28.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_527" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromOtherDebt" xlink:label="Locator_us-gaap_ProceedsFromOtherDebt_528" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_527" xlink:to="Locator_us-gaap_ProceedsFromOtherDebt_528" order="29.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_529" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RepaymentsOfOtherDebt" xlink:label="Locator_us-gaap_RepaymentsOfOtherDebt_530" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_529" xlink:to="Locator_us-gaap_RepaymentsOfOtherDebt_530" order="30.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_531" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="Locator_us-gaap_PaymentsForRepurchaseOfCommonStock_532" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_531" xlink:to="Locator_us-gaap_PaymentsForRepurchaseOfCommonStock_532" order="31.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_533" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="Locator_us-gaap_PaymentsOfDividends_534" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_533" xlink:to="Locator_us-gaap_PaymentsOfDividends_534" order="32.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_535" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="Locator_us-gaap_ProceedsFromIssuanceOfCommonStock_536" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_535" xlink:to="Locator_us-gaap_ProceedsFromIssuanceOfCommonStock_536" order="33.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_537" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="Locator_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_538" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_537" xlink:to="Locator_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_538" order="36.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_539" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_DistributionsToNBCUniversalNoncontrollingInterestHolders" xlink:label="Locator_cmcsa_DistributionsToNBCUniversalNoncontrollingInterestHolders_540" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_539" xlink:to="Locator_cmcsa_DistributionsToNBCUniversalNoncontrollingInterestHolders_540" order="34.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_541" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_DistributionsToOtherNoncontrollingInterests" xlink:label="Locator_cmcsa_DistributionsToOtherNoncontrollingInterests_542" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_541" xlink:to="Locator_cmcsa_DistributionsToOtherNoncontrollingInterests_542" order="35.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/StatementConsolidatedStatementOfComprehensiveIncome">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_669" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_670" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_669" xlink:to="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_670" order="10.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_671" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_672" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_671" xlink:to="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_672" order="9.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_675" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_676" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_675" xlink:to="Locator_us-gaap_ProfitLoss_676" order="1.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_677" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_678" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_677" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_678" order="2.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_679" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_680" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_679" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_680" order="5.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_681" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_682" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_681" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_682" order="7.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_683" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_684" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_683" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_684" order="8.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_685" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_686" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_685" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_686" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_687" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_688" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_687" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_688" order="6.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_673" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_674" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_673" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_674" order="11.0" weight="-1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/EarningsPerShareDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_773" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_774" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_773" xlink:to="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_774" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_775" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="Locator_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_776" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_775" xlink:to="Locator_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_776" order="4.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureInvestmentsDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Investments" xlink:label="Locator_us-gaap_Investments_793" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_MarketableSecurities" xlink:label="Locator_us-gaap_MarketableSecurities_794" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Investments_793" xlink:to="Locator_us-gaap_MarketableSecurities_794" order="2.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Investments" xlink:label="Locator_us-gaap_Investments_795" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="Locator_us-gaap_EquityMethodInvestments_796" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Investments_795" xlink:to="Locator_us-gaap_EquityMethodInvestments_796" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_Investments" xlink:label="Locator_us-gaap_Investments_797" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CostMethodInvestments" xlink:label="Locator_us-gaap_CostMethodInvestments_798" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Investments_797" xlink:to="Locator_us-gaap_CostMethodInvestments_798" order="4.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureInvestmentsFairValueMethodInvestmentsDetails">
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_LiabilitiesRelatedToPrepaidForwardSaleAgreements" xlink:label="Locator_cmcsa_LiabilitiesRelatedToPrepaidForwardSaleAgreements_913" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ObligationsUnderPrepaidForwardSaleAgreements" xlink:label="Locator_cmcsa_ObligationsUnderPrepaidForwardSaleAgreements_914" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_LiabilitiesRelatedToPrepaidForwardSaleAgreements_913" xlink:to="Locator_cmcsa_ObligationsUnderPrepaidForwardSaleAgreements_914" order="4.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_LiabilitiesRelatedToPrepaidForwardSaleAgreements" xlink:label="Locator_cmcsa_LiabilitiesRelatedToPrepaidForwardSaleAgreements_915" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreements" xlink:label="Locator_cmcsa_DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreements_916" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_LiabilitiesRelatedToPrepaidForwardSaleAgreements_915" xlink:to="Locator_cmcsa_DerivativeFairValueOfEmbeddedDerivativeLiabilityComponentOfPrepaidForwardSaleAgreements_916" order="5.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureNoncontrollingInterestsDetails">
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ChangesFromNetIncomeAttributableToParent" xlink:label="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2469" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_2470" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2469" xlink:to="Locator_us-gaap_NetIncomeLoss_2470" order="4.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ChangesFromNetIncomeAttributableToParent" xlink:label="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2471" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_IncreaseInAdditionalPaidInCapitalFromIssuanceOfNoncontrollingEquityInterest" xlink:label="Locator_cmcsa_IncreaseInAdditionalPaidInCapitalFromIssuanceOfNoncontrollingEquityInterest_2472" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2471" xlink:to="Locator_cmcsa_IncreaseInAdditionalPaidInCapitalFromIssuanceOfNoncontrollingEquityInterest_2472" order="5.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ChangesFromNetIncomeAttributableToParent" xlink:label="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2473" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterest" xlink:label="Locator_cmcsa_IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterest_2474" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2473" xlink:to="Locator_cmcsa_IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterest_2474" order="6.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_3095" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_3096" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_3095" xlink:to="Locator_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_3096" order="7.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_3097" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_3098" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_3097" xlink:to="Locator_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_3098" order="6.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_3099" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_3100" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredIncomeTaxExpenseBenefit_3099" xlink:to="Locator_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_3100" order="5.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_3101" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentFederalTaxExpenseBenefit_3102" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_3101" xlink:to="Locator_us-gaap_CurrentFederalTaxExpenseBenefit_3102" order="1.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_3103" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_3104" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_3103" xlink:to="Locator_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_3104" order="2.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_3105" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentForeignTaxExpenseBenefit_3106" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_3105" xlink:to="Locator_us-gaap_CurrentForeignTaxExpenseBenefit_3106" order="3.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureIncomeTaxesFederalStatutoryDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_3125" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="Locator_us-gaap_IncomeTaxReconciliationOtherAdjustments_3126" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeTaxExpenseBenefit_3125" xlink:to="Locator_us-gaap_IncomeTaxReconciliationOtherAdjustments_3126" order="7.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_3127" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_IncomeTaxReconciliationBenefitRelatedToCertainSubsidiaryReorganizations" xlink:label="Locator_cmcsa_IncomeTaxReconciliationBenefitRelatedToCertainSubsidiaryReorganizations_3128" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeTaxExpenseBenefit_3127" xlink:to="Locator_cmcsa_IncomeTaxReconciliationBenefitRelatedToCertainSubsidiaryReorganizations_3128" order="6.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_3129" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense" xlink:label="Locator_us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense_3130" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeTaxExpenseBenefit_3129" xlink:to="Locator_us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense_3130" order="5.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_3131" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:label="Locator_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_3132" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeTaxExpenseBenefit_3131" xlink:to="Locator_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_3132" order="4.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_3133" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="Locator_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_3134" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeTaxExpenseBenefit_3133" xlink:to="Locator_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_3134" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_3135" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="Locator_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_3136" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeTaxExpenseBenefit_3135" xlink:to="Locator_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_3136" order="2.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureIncomeTaxesComponentsOfNetDeferredTaxLiabilityDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsLiabilitiesNet_3193" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_3194" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsLiabilitiesNet_3193" xlink:to="Locator_us-gaap_DeferredTaxAssetsNet_3194" order="6.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_3197" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="Locator_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_3198" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsNet_3197" xlink:to="Locator_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_3198" order="2.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_3199" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="Locator_us-gaap_DeferredTaxAssetsOther_3200" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsNet_3199" xlink:to="Locator_us-gaap_DeferredTaxAssetsOther_3200" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_3201" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther" xlink:label="Locator_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_3202" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsNet_3201" xlink:to="Locator_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_3202" order="4.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_3203" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="Locator_us-gaap_DeferredTaxAssetsValuationAllowance_3204" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsNet_3203" xlink:to="Locator_us-gaap_DeferredTaxAssetsValuationAllowance_3204" order="5.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsLiabilitiesNet_3195" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="Locator_us-gaap_DeferredTaxLiabilities_3196" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsLiabilitiesNet_3195" xlink:to="Locator_us-gaap_DeferredTaxLiabilities_3196" order="8.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="Locator_us-gaap_DeferredTaxLiabilities_3205" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesOther_3206" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxLiabilities_3205" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesOther_3206" order="7.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/InvestmentsInvestmentIncomeLossNetDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_5091" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="Locator_us-gaap_RealizedInvestmentGainsLosses_5092" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_5091" xlink:to="Locator_us-gaap_RealizedInvestmentGainsLosses_5092" order="1.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_5093" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_ImpairmentOfInvestments" xlink:label="Locator_us-gaap_ImpairmentOfInvestments_5094" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_5093" xlink:to="Locator_us-gaap_ImpairmentOfInvestments_5094" order="2.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_5095" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_UnrealizedGainLossOnSecurities" xlink:label="Locator_us-gaap_UnrealizedGainLossOnSecurities_5096" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_5095" xlink:to="Locator_us-gaap_UnrealizedGainLossOnSecurities_5096" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_5097" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements" xlink:label="Locator_cmcsa_MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements_5098" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_5097" xlink:to="Locator_cmcsa_MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements_5098" order="4.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_5099" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_OtherInvestmentIncomeLossNet" xlink:label="Locator_cmcsa_OtherInvestmentIncomeLossNet_5100" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_5099" xlink:to="Locator_cmcsa_OtherInvestmentIncomeLossNet_5100" order="7.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_5101" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="Locator_us-gaap_InvestmentIncomeInterestAndDividend_5102" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_5101" xlink:to="Locator_us-gaap_InvestmentIncomeInterestAndDividend_5102" order="6.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_5103" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet" xlink:label="Locator_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_5104" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_5103" xlink:to="Locator_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_5104" order="5.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureFilmAndTelevisionCostsFilmAndTelevisionCostsDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FilmCosts" xlink:label="Locator_us-gaap_FilmCosts_5243" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ReleasedLessAmortization" xlink:label="Locator_cmcsa_ReleasedLessAmortization_5244" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_FilmCosts_5243" xlink:to="Locator_cmcsa_ReleasedLessAmortization_5244" order="2.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FilmCosts" xlink:label="Locator_us-gaap_FilmCosts_5245" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_CompletedAndNotReleased" xlink:label="Locator_cmcsa_CompletedAndNotReleased_5246" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_FilmCosts_5245" xlink:to="Locator_cmcsa_CompletedAndNotReleased_5246" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_FilmCosts" xlink:label="Locator_us-gaap_FilmCosts_5247" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_InProductionAndInDevelopment" xlink:label="Locator_cmcsa_InProductionAndInDevelopment_5248" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_FilmCosts_5247" xlink:to="Locator_cmcsa_InProductionAndInDevelopment_5248" order="4.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TelevisionCosts" xlink:label="Locator_cmcsa_TelevisionCosts_5249" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ReleasedLessAmortization" xlink:label="Locator_cmcsa_ReleasedLessAmortization_5250" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TelevisionCosts_5249" xlink:to="Locator_cmcsa_ReleasedLessAmortization_5250" order="2.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TelevisionCosts" xlink:label="Locator_cmcsa_TelevisionCosts_5251" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_CompletedAndNotReleased" xlink:label="Locator_cmcsa_CompletedAndNotReleased_5252" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TelevisionCosts_5251" xlink:to="Locator_cmcsa_CompletedAndNotReleased_5252" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TelevisionCosts" xlink:label="Locator_cmcsa_TelevisionCosts_5253" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_InProductionAndInDevelopment" xlink:label="Locator_cmcsa_InProductionAndInDevelopment_5254" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TelevisionCosts_5253" xlink:to="Locator_cmcsa_InProductionAndInDevelopment_5254" order="4.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureSupplementalFinancialInformationReceivablesDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_5303" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsReceivableGrossCurrent" xlink:label="Locator_us-gaap_AccountsReceivableGrossCurrent_5304" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrent_5303" xlink:to="Locator_us-gaap_AccountsReceivableGrossCurrent_5304" order="1.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_5305" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_ReturnsAndIncentivesAllowance" xlink:label="Locator_cmcsa_ReturnsAndIncentivesAllowance_5306" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrent_5305" xlink:to="Locator_cmcsa_ReturnsAndIncentivesAllowance_5306" order="2.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_5307" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="Locator_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_5308" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrent_5307" xlink:to="Locator_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_5308" order="3.0" weight="-1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureAcquisitionsNBCUniversalPurchasePriceAllocationDetails">
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAndNoncontrollingInterestsAcquired" xlink:label="Locator_cmcsa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAndNoncontrollingInterestsAcquired_5669" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount_5670" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAndNoncontrollingInterestsAcquired_5669" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillAmount_5670" order="18.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAndNoncontrollingInterestsAcquired" xlink:label="Locator_cmcsa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAndNoncontrollingInterestsAcquired_5671" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5672" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAndNoncontrollingInterestsAcquired_5671" xlink:to="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5672" order="17.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5673" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationDeferredIncomeTaxesAssetLiabilityNet" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationDeferredIncomeTaxesAssetLiabilityNet_5674" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5673" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationDeferredIncomeTaxesAssetLiabilityNet_5674" order="13.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5675" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_BusinessAcquisitionPurchasePriceAllocationInvestments" xlink:label="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationInvestments_5676" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5675" xlink:to="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationInvestments_5676" order="8.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5677" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_BusinessAcquisitionPurchasePriceAllocationFilmAndTelevisionCost" xlink:label="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationFilmAndTelevisionCost_5678" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5677" xlink:to="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationFilmAndTelevisionCost_5678" order="7.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5679" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncontrollingInterest" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncontrollingInterest_5680" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5679" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncontrollingInterest_5680" order="16.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5681" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssetsAndLiabilities" xlink:label="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssetsAndLiabilities_5682" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5681" xlink:to="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssetsAndLiabilities_5682" order="15.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5683" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesDeferredRevenue" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesDeferredRevenue_5684" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5683" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesDeferredRevenue_5684" order="14.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5685" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt_5686" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5685" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt_5686" order="12.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5687" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_BusinessAcquisitionPurchasePriceAllocationWorkingCapitalExcludingCash" xlink:label="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationWorkingCapitalExcludingCash_5688" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5687" xlink:to="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationWorkingCapitalExcludingCash_5688" order="11.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5689" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill_5690" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5689" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill_5690" order="10.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5691" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment_5692" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5691" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment_5692" order="9.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureAcquisitionsUniversalOrlandoPurchasePriceAllocationDetails">
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5773" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncontrollingInterest" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncontrollingInterest_5774" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5773" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncontrollingInterest_5774" order="11.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5775" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssetsAndLiabilities" xlink:label="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssetsAndLiabilities_5776" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5775" xlink:to="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationOtherNoncurrentAssetsAndLiabilities_5776" order="10.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5777" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesDeferredRevenue" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesDeferredRevenue_5778" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5777" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesDeferredRevenue_5778" order="9.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5779" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt_5780" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5779" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt_5780" order="8.0" weight="-1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5781" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_BusinessAcquisitionPurchasePriceAllocationWorkingCapitalExcludingCash" xlink:label="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationWorkingCapitalExcludingCash_5782" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5781" xlink:to="Locator_cmcsa_BusinessAcquisitionPurchasePriceAllocationWorkingCapitalExcludingCash_5782" order="7.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5783" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill_5784" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5783" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill_5784" order="6.0" weight="1" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5785" />
        <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2012/elts/us-gaap-2012-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment" xlink:label="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment_5786" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_5785" xlink:to="Locator_us-gaap_BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment_5786" order="5.0" weight="1" />
    </calculationLink>
    <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/AcquisitionsTransactionRelatedExpensesDetails">
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TotalTransactionCostsAndTransactionRelatedCosts" xlink:label="Locator_cmcsa_TotalTransactionCostsAndTransactionRelatedCosts_5937" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TransactionCostsInInterestExpense" xlink:label="Locator_cmcsa_TransactionCostsInInterestExpense_5938" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TotalTransactionCostsAndTransactionRelatedCosts_5937" xlink:to="Locator_cmcsa_TransactionCostsInInterestExpense_5938" order="3.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TotalTransactionCostsAndTransactionRelatedCosts" xlink:label="Locator_cmcsa_TotalTransactionCostsAndTransactionRelatedCosts_5939" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TransactionCostsInOtherIncomeExpense" xlink:label="Locator_cmcsa_TransactionCostsInOtherIncomeExpense_5940" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TotalTransactionCostsAndTransactionRelatedCosts_5939" xlink:to="Locator_cmcsa_TransactionCostsInOtherIncomeExpense_5940" order="2.0" weight="1" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TotalTransactionCostsAndTransactionRelatedCosts" xlink:label="Locator_cmcsa_TotalTransactionCostsAndTransactionRelatedCosts_5941" />
        <loc xlink:type="locator" xlink:href="cmcsa-20121231.xsd#cmcsa_TransactionCostsAndTransactionRelatedCostsInOperatingCostsAndExpenses" xlink:label="Locator_cmcsa_TransactionCostsAndTransactionRelatedCostsInOperatingCostsAndExpenses_5942" />
        <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TotalTransactionCostsAndTransactionRelatedCosts_5941" xlink:to="Locator_cmcsa_TransactionCostsAndTransactionRelatedCostsInOperatingCostsAndExpenses_5942" order="1.0" weight="1" />
    </calculationLink>
</linkbase>
</XBRL>
