Exhibit 12.1

Digital Realty Trust, Inc. and Digital Realty Trust, L.P.

Statement of Computation of Ratios (pro forma)

(in thousands, except ratios)

	Digital Realty Trust, Inc.						Digital Realty Trust, L.P.
	Six Months Ended June 30,			Year Ended December 31,			Six Months Ended June 30,			Year Ended December 31,
	2017			2016			2017			2016
Income from continuing operations before noncontrolling interests	$	152,802		$	347,647		$	152,802		$	347,647
Interest expense		133,247			284,319			133,247			284,319
Interest within rental expense (1)		14,580			28,131			14,580			28,131
Noncontrolling interests in consolidated joint ventures		(234	)		(367	)		(234	)		(367	)
Earnings available to cover fixed charges	$	300,395		$	659,730		$	300,395		$	659,730
Fixed charges:
Interest expense	$	133,247		$	284,319		$	133,247		$	284,319
Interest within rental expense (1)		14,580			28,131			14,580			28,131
Capitalized interest		17,279			26,704			17,279			26,704
Total fixed charges		165,106			339,154			165,106			339,154
Preferred stock dividends/preferred unit distributions		43,814			115,010			43,814			115,010
Fixed charges and preferred stock dividends/preferred unit distributions	$	208,920		$	454,164		$	208,920		$	454,164
Ratio of earnings to fixed charges		1.82			1.95			1.82			1.95
Ratio of earnings to fixed charges and preferred stock dividends/preferred unit distributions		1.44			1.45			1.44			1.45

(1) Interest within rental expense represents one-third of rental expense (the approximate portion of rental expense representing interest).