EXHIBIT 12

WASHINGTON REAL ESTATE INVESTMENT TRUST

Computation of Ratios

(In thousands)

Earnings to fixed charges ratio:

 

     Q1 2011     Q1 2010  

Income from continuing operations

   $ 5,146      $ 4,366   

Additions:

    

Fixed charges

    

Interest expense

     17,126        16,838   

Capitalized interest

     83        342   
                
     17,209        17,180   

Deductions:

    

Capitalized interest

     (83     (342

Net income attributable to noncontrolling interests

     (23     (49
                

Adjusted earnings

   $ 22,249      $ 21,155   
                

Fixed charges (from above)

   $ 17,209      $ 17,180   

Ratio of Earnings to Fixed Charges

     1.29        1.23   

Debt service coverage ratio:

 

     Q1 2011      Q1 2010  

Net income attributable to the controlling interests

   $ 4,665       $ 5,216   

Additions:

     

Interest expense

     17,126         17,065   

Real estate depreciation and amortization

     25,249         23,608   

Real estate impairment

     599         —     

Non-real estate depreciation

     268         272   
                 
     47,907         46,161   

Deductions:

     

Loss (gain) on extinguishment of debt

     —           42   
                 

Adjusted EBITDA

   $ 47,907       $ 46,203   

Debt service

     

Interest expense

   $ 17,126       $ 17,065   

Principal amortization

     747         1,108   
                 
   $ 17,873       $ 18,173   

Debt service coverage ratio

     2.68         2.54