exv12

EXHIBIT 12

McKESSON CORPORATION
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES


	Years Ended March 31,
(Dollar in millions)	2011			2010			2009			2008			2007

Earnings:
Income from continuing operations before income taxes	$	1,635		$	1,864		$	1,064		$	1,457		$	1,297
Adjustment to exclude equity in net income of and dividends from equity investees		9			(2	)		(1	)		(17	)		(17	)
Fixed charges		280			240			195			198			141
Amortization of capitalized interest		3			4			4			4			3
Less: Capitalized interest		(3	)		—			(1	)		(3	)		(3	)


Earnings as adjusted	$	1,924		$	2,106		$	1,261		$	1,639		$	1,421


Fixed charges:
Interest expense ^{(a) (c)}	$	222		$	187		$	144		$	142		$	99
Capitalized interest		3			—			1			3			3
Portion of rental expense representative of the interest factor ^(b)		55			53			50			53			39


Total fixed charges	$	280		$	240		$	195		$	198		$	141


Ratio:

Ratio of earnings to fixed charges		6.9			8.8			6.5			8.3			10.1


^(a)		Interest expense includes amortization of debt discounts and deferred loan costs.

^(b)		One-third of net rent expense is the portion of rental expense deemed representative of the interest factor.

^(c)		Interest accrued on the liability recorded for uncertain tax positions is excluded from Interest expense.