CORNING INCORPORATED AND SUBSIDIARY COMPANIES Exhibit #12 COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED DIVIDENDS (Dollars in millions, except ratios) Three Months Ended Fiscal Year Ended ------------------ ------------------------------------------ March 31, March 31, Dec. 31, Dec. 31, Dec. 31, Jan. 1, Jan. 2, 1998 1997 1997 1996 1995 1995 1994 --------- --------- -------- -------- -------- ------- ------- Income before taxes on income $64.5 $143.5 $629.2 $455.9 $389.4 $286.3 $93.7 Adjustments: Share of earnings (losses) before taxes of 50% owned companies 27.1 18.5 111.5 130.3 95.2 89.0 (137.0) Gain (loss) before taxes of greater than 50% owned unconsolidated subsidiary 0.7 (3.1) (4.0) (3.1) Distributed income of less than 50% owned companies and share of loss if debt is guaranteed 0.1 2.1 4.5 Amortization of capitalized interest 3.6 3.5 16.6 11.8 9.6 13.3 13.0 Fixed charges net of capitalized interest 34.5 35.2 149.9 105.9 82.7 128.7 91.4 ----- ------ ------ ------ ------ ------ ----- Earnings before taxes and fixed charges as adjusted $129.8 $200.7 $907.2 $704.6 $610.1 $515.4 $62.5 ====== ====== ====== ====== ====== ====== ===== Fixed charges: Interest incurred $ 27.3 $ 25.0 $104.7 $ 73.6 $ 65.4 $ 64.9 $51.1 Share of interest incurred of 50% owned companies and interest on guaranteed debt of less than 50% owned companies 10.2 10.0 51.0 38.7 10.2 60.8 40.9 Interest incurred by greater than 50% owned unconsolidated subsidiary 0.7 0.8 0.8 Portion of rent expense which represents interest factor 5.3 3.3 15.9 12.1 13.3 10.8 7.3 Share of portion of rent expense which represents interest factor for 50% owned companies 1.6 0.7 3.8 1.4 2.7 9.4 9.1 Portion of rent expense which represents interest factor for greater than 50% owned unconsolidated subsidiary 0.1 0.1 Amortization of debt costs 0.7 0.4 1.6 2.2 (0.1) 0.6 0.4 ------ ------ ----- ----- ----- ----- ----- Total fixed charges 45.1 39.4 177.0 128.0 92.3 147.3 109.7 Capitalized interest (10.6) (4.2) (27.1) (22.1) (9.6) (18.6) (18.3) ------ ------ ----- ----- ----- ----- ----- Total fixed charges net of capitalized interest $ 34.5 $ 35.2 $149.9 $105.9 $ 82.7 $128.7 $91.4 ====== ====== ====== ====== ====== ====== ===== Preferred dividends: Preferred dividend requirements $ 3.8 $ 3.8 $ 15.3 $ 15.7 $ 15.7 $ 8.2 $ 2.1 Ratio of pre-tax income to income before minority interest and equity earnings 1.5 1.5 1.5 1.5 1.4 1.4 1.0 ------ ------ ------ ------ ------ ------ ------ Pre-tax preferred dividend requirement 5.7 5.7 23.0 23.6 21.7 11.8 2.2 Total fixed charges 45.1 39.4 177.0 128.0 92.3 147.3 109.7 ------ ------ ------ ------ ------ ------ ------ Fixed charges and pre-tax preferred dividend requirement $ 50.8 $ 45.1 $200.0 $151.6 $114.0 $159.1 $111.9 ====== ====== ====== ====== ====== ====== ====== Ratio of earnings to combined fixed charges and preferred dividends 2.6x 4.5x 4.5x 4.7x 5.4x 3.2x - ====== ====== ====== ====== ====== ====== ====== Earnings did not cover combined fixed charges and preferred dividends by $49.4 in the fiscal year ended January 2, 1994. - 17 -