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.
	Three Months Ended March 31,			Year Ended December 31,			Three Months Ended March 31,			Year Ended December 31,
	2017			2016			2017			2016
Income from continuing operations before noncontrolling interests	$	71,720		$	348,444		$	71,720		$	348,444
Interest expense		64,936			283,522			64,936			283,522
Interest within rental expense (1)		7,280			28,131			7,280			28,131
Noncontrolling interests in consolidated joint ventures		(121	)		(367	)		(121	)		(367	)
Earnings available to cover fixed charges	$	143,815		$	659,730		$	143,815		$	659,730
Fixed charges:
Interest expense	$	64,936		$	283,522		$	64,936		$	283,522
Interest within rental expense (1)		7,280			28,131			7,280			28,131
Capitalized interest		4,614			16,324			4,614			16,324
Total fixed charges		76,830			327,977			76,830			327,977
Preferred stock dividends/distributions		20,726			104,510			20,726			104,510
Fixed charges and preferred stock dividends/distributions	$	97,556		$	432,487		$	97,556		$	432,487
Ratio of earnings to fixed charges		1.87			2.01			1.87			2.01
Ratio of earnings to fixed charges and preferred stock dividends/distributions		1.47			1.53			1.47			1.53

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