EXHIBIT 12 PFIZER INC. AND SUBSIDIARY COMPANIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Year Ended December 31, ----------------------- 1996 1995 1994 1993 1992 ------ ------ ------ ------ ------ (millions of dollars, except ratios) Determination of Earnings: Income from continuing operations before provision for taxes on $2,804 $2,299 $1,830 $835 $1,541 income, minority interests and cumulative effect of accounting changes......................................... Less: Minority interests......................................... 6 7 5 2 3 Undistributed earnings/(losses) of unconsolidated subsidiaries............................................. 0 0 (1) 1 8 ------ ------ ------ ---- ------ Adjusted income 2,798 2,292 1,826 832 1,530 Fixed charges.............................................. 206 232 158 136 130 ------ ------ ------ ---- ------ Total earnings as defined................................ $3,004 $2,524 $1,984 $968 $1,660 ====== ====== ====== ==== ====== Fixed charges Interest expense (a).......................................... $165 $192 $127 $107 $103 Rents (b)..................................................... 41 40 31 29 27 ------ ------ ------ ---- ------ Fixed charges.............................................. 206 232 158 136 130 Capitalized interest.......................................... 5 13 15 14 12 ------ ------ ------ ---- ------ Total fixed charges........................................ $211 $245 $173 $150 $142 ====== ====== ====== ==== ====== Ratio of earnings to fixed charges............................... 14.2 10.3 11.5 6.5 11.7 ====== ====== ====== ==== ====== - ----------- (a) Interest expense includes amortization of debt discount and expenses. (b) Rents included in the computation consist of one-third of rental expense, which the Company believes to be a conservative estimate of an interest factor in its leases, which are not material.