management 2019s discussion and analysis 164 jpmorgan chase & co./2013 annual report firm ) is required to hold more than the additional 2.5% ( 2.5 % ) of tier 1 common . in addition , basel iii establishes a 6.5% ( 6.5 % ) tier i common equity standard for the definition of 201cwell capitalized 201d under the prompt corrective action ( 201cpca 201d ) requirements of the fdic improvement act ( 201cfdicia 201d ) . the tier i common equity standard is effective from the first quarter of 2015 . the following chart presents the basel iii minimum risk-based capital ratios during the transitional periods and on a fully phased-in basis . the chart also includes management 2019s target for the firm 2019s tier 1 common ratio . it is the firm 2019s current expectation that its basel iii tier 1 common ratio will exceed the regulatory minimums , both during the transition period and upon full implementation in 2019 and thereafter . the firm estimates that its tier 1 common ratio under the basel iii advanced approach on a fully phased-in basis would be 9.5% ( 9.5 % ) as of december 31 , 2013 , achieving management 2019s previously stated objectives . the tier 1 common ratio as calculated under the basel iii standardized approach is estimated at 9.4% ( 9.4 % ) as of december 31 , 2013 . the tier 1 common ratio under both basel i and basel iii are non-gaap financial measures . however , such measures are used by bank regulators , investors and analysts to assess the firm 2019s capital position and to compare the firm 2019s capital to that of other financial services companies . the following table presents a comparison of the firm 2019s tier 1 common under basel i rules to its estimated tier 1 common under the advanced approach of the basel iii rules , along with the firm 2019s estimated risk-weighted assets . key differences in the calculation of rwa between basel i and basel iii advanced approach include : ( 1 ) basel iii credit risk rwa is based on risk-sensitive approaches which largely rely on the use of internal credit models and parameters , whereas basel i rwa is based on fixed supervisory risk- weightings which vary only by counterparty type and asset class ; and ( 2 ) basel iii includes rwa for operational risk , whereas basel i does not . operational risk capital takes into consideration operational losses in the quarter following the period in which those losses were realized , and the calculation generally incorporates such losses irrespective of whether the issues or business activity giving rise to the losses have been remediated or reduced . the firm 2019s operational risk capital model continues to be refined in conjunction with the firm 2019s basel iii advanced approach parallel run . as a result of model enhancements in 2013 , as well as taking into consideration the legal expenses incurred by the firm in 2013 , the firm 2019s operational risk capital increased substantially in 2013 over 2012 . tier 1 common under basel iii includes additional adjustments and deductions not included in basel i tier 1 common , such as the inclusion of accumulated other comprehensive income ( 201caoci 201d ) related to afs securities and defined benefit pension and other postretirement employee benefit ( 201copeb 201d ) plans . december 31 , 2013 ( in millions , except ratios ) .
what would the estimated minimum amount of tier 1 common equity be under the minimum basel 6.5% ( 6.5 % ) standard ? ( billions )
estimated risk-weighted assets under basel iii advanced approach ( b ) $ 1590873 estimated tier 1 common ratio under basel iii advanced approach ( c ) 9.5% ( 9.5 % ) ( a ) certain exposures , which are deducted from capital under basel i , are risked-weighted under basel iii. .