Exhibit No. 12a


                CONSTELLATION ENERGY GROUP, INC. AND SUBSIDIARIES
                COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES




                                                                                  12 Months Ended
                                             ---------------------------------------------------------------------------------------
                                                   March       December      December       December      December       December
                                                   2002          2001          2000           1999          1998           1997
                                               -----------  ------------  ------------   ------------  ------------   ------------
                                                                             (In Millions of Dollars)

Income from Continuing Operations
   (Before Extraordinary Loss and
   Cumulative Effect of Change in
                                                                                                    
   Accounting Principle)                       $    207.7   $      82.4   $     345.3    $     326.4   $     305.9    $     254.1
Taxes on Income, Including Tax Effect for
      BGE Preference Stock Dividends                100.4          29.7         221.4          182.5         169.3          145.1
                                               -----------  ------------  ------------   ------------  ------------   ------------
Adjusted Income                                $    308.1   $     112.1   $     566.7    $     508.9   $     475.2    $     399.2
                                               -----------  ------------  ------------   ------------  ------------   ------------
Fixed Charges:
      Interest and Amortization of
          Debt Discount and Expense and
          Premium on all Indebtedness          $    218.9   $     226.1   $     261.5    $     245.7   $     255.3    $     234.2
      Earnings Required for BGE Preference
          Stock Dividends                            21.3          21.4          21.9           21.0          33.8           45.1
      Capitalized Interest                           54.0          55.8          21.1            2.7           3.6            8.4
      Interest Factor in Rentals                      2.1           2.0           2.2            1.8           1.9            1.9
                                               -----------  ------------  ------------   ------------  ------------   ------------
      Total Fixed Charges                      $    296.3   $     305.3   $     306.7    $     271.2   $     294.6    $     289.6
                                               -----------  ------------  ------------   ------------  ------------   ------------

Earnings (1)                                   $    550.4   $     361.6   $     852.3    $     777.4   $     766.2    $     680.4
                                               ===========  ============  ============   ============  ============   ============


Ratio of Earnings to Fixed Charges                   1.86          1.18          2.78           2.87          2.60           2.35




(1)   Earnings are deemed to consist of income from continuing operations
      (before extraordinary loss and cumulative effect of change in accounting
      principle) that includes earnings of Constellation Energy's consolidated
      subsidiaries, equity in the net income of unconsolidated subsidiaries,
      income taxes (including deferred income taxes, investment tax credit
      adjustments, and the tax effect of BGE's preference stock dividends), and
      fixed charges other than capitalized interest.