Exhibit 12.1 UNITED STATES STEEL CORPORATION COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (Unaudited) ---------------------------------------------------------- (Dollars in Millions) Three Months Ended Year Ended December 31 March 31-------------------------------- 2002 2001 2001 2000 1999 1998 1997 ---- ---- ---- ---- ---- ---- ---- Portion of rentals representing interest $11 $10 $45 $48 $46 $52 $47 Capitalized interest - - 1 3 6 6 7 Other interest and fixed charges 35 54 153 115 75 47 91 Pretax earnings which would be required to cover preferred stock dividend requirements of parent - 3 12 12 14 15 20 ---- ---- ---- ---- ---- ---- ---- Combined fixed charges and preferred stock dividends (A) $46 $67 $211 $178 $141 $120 $165 ==== ==== ==== ==== ==== ==== ==== Earnings-pretax income with applicable adjustments (B) $(50) $(69)$(387) $187 $295 $618 $781 ==== ==== ==== ==== ==== ==== ==== Ratio of (B) to (A) (a) (b) (c) 1.05 2.10 5.15 4.72 ==== ==== ==== ==== ==== ==== ==== (a) Earnings did not cover fixed charges by $96 million. (b) Earnings did not cover fixed charges by $136 million. (c) Earnings did not cover fixed charges by $598 million.