Exhibit 12

WASHINGTON REAL ESTATE INVESTMENT TRUST

Computation of Ratios

(In thousands)

Earnings to fixed charges ratio:

	Three Months Ended   September 30,								Nine Months Ended   September 30,
	2013				2012				2013				2012
Income from continuing operations	$	1,709			$	2,604			$	4,104			$	7,384
Additions:
Fixed charges
Interest expense	15,930				14,886				47,944				43,983
Capitalized interest	124				392				607				1,250
	16,054				15,278				48,551				45,233
Deductions:
Capitalized interest	(124		)		(392		)		(607		)		(1,250		)
Adjusted earnings	17,639				17,490				52,048				51,367
Fixed charges (from above)	$	16,054			$	15,278			$	48,551			$	45,233
Ratio of earnings to fixed charges	1.10				1.14				1.07				1.14
Note: Certain prior period amounts have been reclassified to conform to the current period presentation due to the reclassification of certain properties as discontinued operations (see note 3 to the consolidated financial statements).

Debt service coverage ratio:

	Three Months Ended   September 30,								Nine Months Ended   September 30,
	2013				2012				2013				2012
Net income attributable to the controlling interests	$	5,840			$	9,561			18,438				$	20,750
Additions:
Interest expense (1)	16,259				16,049				48,929				47,477
Real estate depreciation and amortization (1)	24,383				26,218				75,489				77,803
Income tax expense	6				17				30				188
Non-real estate depreciation	203				254				614				783
	40,851				42,538				125,062				126,251
Deductions:
Gain on sale of real estate	—				(3,724		)		(3,195		)		(3,724		)
Adjusted EBITDA	46,691				48,375				140,305				143,277
Debt service
Interest expense	16,259				16,049				48,929				47,477
Principal amortization	823				1,250				2,466				4,150
	$	17,082			$	17,299			$	51,395			$	51,627
Debt service coverage ratio	2.73				2.80				2.73				2.78
(1) Includes discontinued operations