EXHIBIT 12.1 UNOCAL CORPORATION AND CONSOLIDATED SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES For the Nine Months Ended September 30 ------------------- Millions of dollars ........................................ 1997 1996 - ---------------------------------------------------------------------------------- Earnings from continuing operations ........................ $ 521 $ 453 Provision for income taxes ................................. 68 284 ------------------- Earnings subtotal ................................. 589 737 Fixed charges included in earnings: Interest expense ........................................ $ 147 $ 215 Distribution on convertible preferred securities ........ 24 2 Interest portion of rentals ............................. 21 31 ------------------- Fixed charges subtotal ............................ 192 248 Earnings from continuing operations available before fixed charges .......................... $ 781 $ 985 ------------------- Fixed charges: Fixed charges included in earnings ...................... $ 192 $ 248 Capitalized interest .................................... 26 9 ------------------- Total fixed charges ............................... $ 218 $ 257 ------------------- Ratio of earnings from continuing operations to fixed charges ........................................ 3.6 3.8 -------------------