Exhibit 12.1

United States Steel Corporation

Computation of Ratio of Earnings to Combined Fixed Charges

and Preferred Stock Dividends

(Unaudited)

 

     Year Ended December 31,  

(Dollars in Millions)

   2008    2007     2006    2005      2004  

Portion of rentals representing interest

   $ 33    $ 32     $ 44    $ 45      $ 51  

Capitalized interest

     14      7       3      12        8  

Other interest and fixed charges

     179      135       123      87        131  

Pretax earnings which would be required to cover preferred stock dividend requirements

     —        —         10      25        23  
                                       

Combined fixed charges and preferred stock dividends (A)

   $ 226    $ 174     $ 180    $ 169      $ 213  
                                       

Earnings-pretax income with applicable adjustments (B)

   $ 3,203    $ 1,305     $ 1,884    $ 1,467      $ 1,687  
                                       

Ratio of (B) to (A)

     14.17      7.50       10.47      8.68        7.92