Exhibit 12.1

DuPont Fabros Technology, Inc.

Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Fixed Charges and Preferred Share Dividends

(Unaudited)

(Amounts in thousands, except ratios)

	Nine months ended September 30,			Year ended December 31,
	2013			2012			2011			2010			2009			2008
Earnings:
Net Income	$	32,516		$	60,833		$	79,480		$	43,708		$	2,886		$	36,160
Add: Fixed charges		41,745			56,100			58,077			69,742			41,455			28,199
Less: Capitalized interest		(1,617	)		(4,711	)		(28,411	)		(26,375	)		(7,021	)		(15,448	)
Total earnings	$	72,644		$	112,222		$	109,146		$	87,075		$	37,320		$	48,911
Fixed Charges and Preferred Stock Dividends:
Interest expense	$	37,490		$	47,765		$	27,096		$	36,746		$	25,462		$	10,852
Capitalized interest		1,522			4,434			27,024			25,177			5,691			13,150
Amortization of deferred financing costs		2,542			3,496			2,446			6,497			8,854			1,782
Capitalization of amortization of deferred financing costs		95			277			1,387			1,198			1,330			2,298
Interest factor in rents		96			128			124			124			118			117
Fixed Charges	$	41,745		$	56,100		$	58,077		$	69,742		$	41,455		$	28,199
Preferred stock dividend requirements (1)		20,433			27,053			20,874			3,157			—			—
Combined Fixed Charges and Preferred Stock Dividends	$	62,178		$	83,153		$	78,951		$	72,899		$	41,455		$	28,199
Ratio of earnings to fixed charges (2)		1.74			2.00			1.88			1.25			0.90			1.73
Ratio of earnings to combined fixed charges and preferred stock dividends (2)		1.17			1.35			1.38			1.19			0.90			1.73

(1) The Company did not have any preferred stock outstanding for the periods prior to the year ended December 31, 2010.

(2) The shortfall of earnings to fixed charges for the year ended December 31, 2009 was $4.1 million. Included in earnings for the year was a charge of $13.7 million related to the discontinuance of cash flow hedge.