Exhibit 11 E. I. DU PONT DE NEMOURS AND COMPANY CALCULATION OF EARNINGS PER SHARE (Dollars in millions, except per share) Years Ended December 31 --------------------------------------------------------------------------------------- 2001 2000 1999 1998 1997 ------------- ------------- ------------- ------------- ------------- Net income less dividends on preferred stock .............. $ 4,329 $ 2,304 $ 7,680 $ 4,470 $ 2,395 ============== ============== ============== ============== ============== Average number of common shares (excludes treasury stock and the shares held by DuPont Flexitrust) - Basic .......... 1,035,992,748 1,043,358,416 1,084,537,228 1,128,826,525 1,130,755,483 Shares assumed to be issued due to stock options ............. 5,171,881 7,684,108 13,433,101 16,520,503 19,047,967 -------------- -------------- -------------- -------------- -------------- Adjusted average number of common shares and share equivalents - Diluted .................... 1,041,164,629 1,051,042,524 1,097,970,329 1,145,347,028 1,149,803,450 ============== ============== ============== ============== ============== Earnings per share: - Diluted .................... $ 4.16 (a) $ 2.19 $ 6.99 (b) $ 3.90 $ 2.08 ============== ============== ============== ============== ============== - Basic ...................... $ 4.18 (a) $ 2.21 $ 7.08 (b) $ 3.96 $ 2.12 ============== ============== ============== ============== ============== - ----------------- (a) Includes cumulative effect of a change in accounting principle of $.01 diluted and basic. (b) Includes income from discontinued operations of $6.80 diluted and $6.89 basic.