Exhibit 12

As discussed in Note 2 to the consolidated financial statements, effective January 1, 2009, we adopted FASB Staff Position No. APB 14-1 (“FSP 14-1”), Accounting for Convertible Debt Instruments that may be Settled in Cash Upon Conversion, SFAS No. 160 (“FAS 160”), Noncontrolling Interests in Consolidated Financial Statements and FASB Staff Position No. EITF 03-6-1 (“FSP 03-6-1”), Determining Whether Instruments Granted in Share-Based Payment Transactions are Participating Securities. These accounting pronouncements require retrospective application. As discussed in Note 3 to the consolidated financial statements, as of March 2009 we classified Charleston Business as held for sale in accordance with SFAS No. 144 (“FAS 144”), Accounting for Impairment or Disposal of Long-Lived Assets, and must consequently present the revenues and expenses associated with Charleston Business Center as discontinued operations. The impacts of these standards are reflected in Exhibit 12 below.

WASHINGTON REAL ESTATE INVESTMENT TRUST

Computation of Ratio of Earnings to Fixed Charges

(In thousands)

 

     Q1 2008     Q2 2008     Q3 2008     Q4 2008     2008     2007     2006     2005     2004  

Income (loss) from continuing operations

   $ (3,799   $ 3,756      $ 4,189      $ 4,802      $ 8,948      $ 26,432      $ 33,779      $ 36,552      $ 37,407   

Additions:

                  

Fixed charges

                  

Interest expense

     18,900        18,840        18,446        18,855        75,041        66,336        47,873        36,821        33,284   

Capitalized interest

     831        741        477        298        2,347        6,672        3,782        1,127        703   
                                                                        
     19,731        19,581        18,923        19,153        77,388        73,008        51,655        37,948        33,987   

Deductions:

                  

Capitalized interest

     (831     (741     (477     (298     (2,347     (6,672     (3,782     (1,127     (703

Net income attributable to noncontrolling interests

     (57     (53     (48     (53     (211     (217     (204     (172     (155
                                                                        

Adjusted earnings

   $ 15,044      $ 22,543      $ 22,587      $ 23,604      $ 83,778      $ 92,551      $ 81,448      $ 73,201      $ 70,536   
                                                                        

Fixed Charges (from above)

   $ 19,731      $ 19,581      $ 18,923      $ 19,153      $ 77,388      $ 73,008      $ 51,655      $ 37,948      $ 33,987   

Ratio of Earnings to Fixed Charges

     (a     1.15        1.19        1.23        1.08        1.27        1.58        1.93        2.08   

(a) Due to our loss from continuing operations during Q1 2008, the coverage ratio was less than l:l. WRIT must generate additional earnings of $4.7 million to achieve a coverage of 1:1. The loss in Q1 2008 reflects the impact of a loss on extinguishment of debt of $8.4 million.

Note: Q4 2008 reflects the impact of a gain on extinguishment of debt of $2.9 million. YTD 2008 reflects the impact of a net loss on extinguishment of debt of $5.6 million. See Note 6 to the consolidated financial statements for further discussion.