EXHIBIT 12.1 MILLENNIUM CHEMICALS INC. COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (IN MILLIONS) FISCAL YEAR YEAR ENDED ENDED DECEMBER 31, SEPTEMBER 30, ----------------------- --------------- 1997 1996 1995 1994 1993 ----- ----- ----- ----- ------ Pre-tax income........................................................ $ 342 $ 330 $ 554 $ 131 $ 151 Equistar earnings..................................................... (18) -- -- -- -- Suburban losses/earnings.............................................. 5 (37) -- -- -- Interest expense (a).................................................. 131 214 240 206 14 Rent expense (a)...................................................... 19 18 20 19 1 ----- ----- ----- ----- ------ Total............................................................ $ 479 $ 525 $ 814 $ 356 $ 166 ----- ----- ----- ----- ------ ----- ----- ----- ----- ------ (a) Fixed charges........................................... $ 150 $ 232 $ 260 $ 225 $ 15 ----- ----- ----- ----- ------ ----- ----- ----- ----- ------ Ratio of earnings to fixed charges.................................... 3.3:1 2.3:1 3.1:1 1.6:1 11.1:1