Dupont Fabros Technology S-3ASR Automatic shelf registration

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)

	Three months ended March 31,			Year ended December 31,
	2015			2014			2013			2012			2011			2010
Earnings:
Net Income	$	26,333		$	124,611		$	53,605		$	60,833		$	79,480		$	43,708
Add: Fixed charges		12,022			47,059			53,920			56,100			58,077			69,742
Less: Capitalized interest		(3,087	)		(10,245	)		(4,000	)		(4,711	)		(28,411	)		(26,375	)
Total earnings	$	35,268		$	161,425		$	103,525		$	112,222		$	109,146		$	87,075
Fixed Charges and Preferred Stock Dividends:
Interest expense	$	8,258		$	33,699		$	46,443		$	47,765		$	27,096		$	36,746
Capitalized interest		2,856			9,644			3,774			4,434			27,024			25,177
Amortization of deferred financing costs		642			2,980			3,349			3,496			2,446			6,497
Capitalization of amortization of deferred financing costs		231			601			226			277			1,387			1,198
Interest factor in rents		35			135			128			128			124			124
Fixed Charges	$	12,022		$	47,059		$	53,920		$	56,100		$	58,077		$	69,742
Preferred stock dividend requirements		6,811			27,245			27,245			27,053			20,874			3,157
Combined Fixed Charges and Preferred Stock Dividends	$	18,833		$	74,304		$	81,165		$	83,153		$	78,951		$	72,899
Ratio of earnings to fixed charges		2.93			3.43			1.92			2.00			1.88			1.25
Ratio of earnings to combined fixed charges and preferred stock dividends		1.87			2.17			1.28			1.35			1.38			1.19