EXHIBIT 11.1 INFONAUTICS, INC. Computation of Earnings Per Share THREE MONTHS ENDED NINE MONTHS ENDED SEPTEMBER 30, SEPTEMBER 30, 1997 1996 1997 1996 Net loss applicable to common shares $(3,897,800) $(3,421,600) $(13,262,800) $(9,039,000) ------------ ------------ ------------- ------------ Weighted average number of shares outstanding during the period 9,491,600 9,486,800 9,491,600 7,032,000 Incremental shares calculated per SAB Topic 4:D -- -- -- 932,800 ------------ ------------ ------------- ------------ Total weighted average number of common and equivalent shares outstanding 9,491,600 9,486,800 9,491,600 7,964,800 ------------ ------------ -------------- ------------ Net loss per common equivalent share (1) $ (.41) $ (.36) $ (1.40) $ (1.13) ------------ ------------ -------------- ------------ (1)Fully diluted net loss per share has not been presented separately, as the amounts would not be materially different from primary net loss per share. 15