Reg. S-K
Item 601
Exhibit 12

BERKSHIRE HATHAWAY INC.
Calculation of Ratio of Consolidated Earnings to Consolidated Fixed Charges
(Dollars in millions)

	Year Ended December 31,
	2006		2005			2004			2003			2002
Net earnings	$	11,015	$	8,528		$	7,308		$	8,151		$	4,286
Income tax expense		5,505		4,159			3,569			3,805			2,059
Minority interests in earnings		258		104			59			64			14
Equity in earnings of MidAmerican Energy Holdings Company		—		(523	)		(237	)		(429	)		(359	)
Fixed charges*		1,979		867			875			614			840
Earnings available for fixed charges	$	18,757	$	13,135		$	11,574		$	12,205		$	6,840
Investment and derivative gains, pretax, included in Earnings available for fixed charges	$	2,635	$	5,408		$	3,471		$	4,083		$	838
Fixed charges*
Interest on indebtedness (including amortization of debt discount and expense)	$	1,724	$	723		$	721		$	472		$	725
Rentals representing interest and other		255		144			154			142			115
	$	1,979	$	867		$	875		$	614		$	840
Ratio of earnings to fixed charges*		9.48x		15.15x			13.23x			19.88x			8.14x
Ratio of earnings, excluding investment and derivative gains, to fixed charges*		8.15x		8.91x			9.26x			13.23x			7.15x

* Includes fixed charges of finance and financial products and utilities and energy businesses as follows:

	2006		2005		2004		2003		2002
Finance and financial products	$	571	$	598	$	602	$	337	$	551
Utilities and energy		1,070		—		—		—		—
Excluding fixed charges of finance and financial products and utilities and energy businesses the ratios of earnings to fixed charges were as follows:
	2006		2005		2004		2003		2002
Including investment and derivative gains		50.64x		46.61x		40.19x		42.84x		21.76x
Excluding investment and derivative gains		42.84x		26.50x		27.48x		28.10x		18.86x