Exhibit 12 CHEVRON CORPORATION - TOTAL ENTERPRISE BASIS COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Dollars in Millions) Six Months Ended Year Ended December 31, ------------------------------------------------ June 30, 1999 1998 1997 1996 1995 1994 ------------- -------- -------- -------- -------- -------- Net Income (1) $ 679 $1,339 $ 3,256 $2,607 $ 930 $ 1,693 Income Tax Expense 500 658 2,428 2,624 1,094 1,322 Distributions (Less Than) Greater Than Equity in Earnings of Less Than 50% Owned Affiliates (71) (72) (70) 29 (5) (3) Minority Interest 2 7 11 4 - 3 Previously Capitalized Interest Charged to Earnings During Period 18 35 28 24 47 32 Interest and Debt Expense 257 492 405 471 557 453 Interest Portion of Rentals (2) 89 187 167 158 148 156 ------- ------ ------- ------- ------- ------- Earnings before Provisions for Taxes and Fixed Charges $ 1,474 $2,646 $ 6,225 $ 5,917 $ 2,771 $ 3,656 ======= ====== ======= ======= ======= ======= Interest and Debt Expense $ 257 $ 492 $ 405 $ 471 $ 557 $ 453 Interest Portion of Rentals (2) 89 187 167 158 148 156 Capitalized Interest 4 39 82 108 141 80 ------- ------ ------- ------- ------- ------- Total Fixed Charges $ 350 $ 718 $ 654 $ 737 $ 846 $ 689 ======= ====== ======= ======= ======= ======= - ------------------------------------------------------------------------------------------------------------------- Ratio of Earnings to Fixed Charges 4.21 3.68 9.52 8.03 3.28 5.31 - ------------------------------------------------------------------------------------------------------------------- <FN> (1) The information for 1995 and thereafter reflects the company's adoption of the Financial Accounting Standards Board Statement No. 121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed Of," effective October 1, 1995. (2) Calculated as one-third of rentals. </FN> -28-