Exhibit 12.1

Brandywine Realty Trust

Computation of Ratio of Earnings to Combined Fixed Charges and Preferred Share Distributions

(in thousands)

	For the years ended December 31,
	2017			2016			2015			2014			2013
Earnings before fixed charges:
Add:
Income (loss) from continuing operations before non-controlling interest and equity in income (loss) from unconsolidated real estate ventures	$	130,165		$	52,004		$	(29,929	)	$	6,814		$	35,318
Distributed income of equity investees		20,781			622			1,223			1,164			1,650
Amortization of capitalized interest		5,019			4,899			4,277			3,840			3,557
Fixed charges - per below		88,529			101,574			129,307			138,007			132,146
Less:
Capitalized interest		(3,527	)		(12,835	)		(12,150	)		(6,803	)		(3,137	)
Earnings before fixed charges	$	240,967		$	146,264		$	92,728		$	143,022		$	169,534
Fixed charges and Preferred Distributions:
Interest expense from continuing operations (including amortization)	$	84,321		$	88,083		$	116,511		$	130,621		$	127,585
Capitalized interest		3,527			12,835			12,150			6,803			3,137
Ground leases and other		681			656			646			583			1,424
Total Fixed Charges		88,529			101,574			129,307			138,007			132,146
Income allocated to preferred shareholders		2,032			6,900			6,900			6,900			6,900
Total Preferred Distributions		2,032			6,900			6,900			6,900			6,900
Total combined fixed charges and preferred distributions	$	90,561		$	108,474		$	136,207		$	144,907		$	139,046
Ratio of earnings to combined fixed charges and preferred distributions		2.66			1.35		(a)			(a)			1.22

(a) Due to the registrant's loss in the period, the coverage ratio was less than 1:1.  The registrant must generate additional earnings of $43,479 for the year ended December 31, 2015 and $1,885 for the year ended December 31, 2014 to achieve a coverage ratio of 1:1.