EXHIBIT 11 CANTEL INDUSTRIES, INC. COMPUTATION OF EARNINGS PER SHARE Three Months Ended October 31, 1996 1995 --------- --------- PRIMARY Weighted average number of shares outstanding 3,891,803 3,765,352 Dilutive effect of options and warrants using the treasury stock method and average market price for the period 429,339 - --------- --------- Weighted average number of shares and common stock equivalents 4,321,142 3,765,352 --------- --------- --------- --------- Net income (loss) $ 222,000 $ (38,000) --------- --------- --------- --------- Net income (loss) per common share $ 0.05 $(0.01) ------ ------ ------ ------ EXHIBIT 11 CANTEL INDUSTRIES, INC. COMPUTATION OF EARNINGS PER SHARE Three Months Ended October 31, 1996 1995 --------- --------- FULLY DILUTED Weighted average number of shares outstanding 3,891,803 3,765,352 Dilutive effect of options and warrants using the treasury stock method and the higher of the period-end or average market price for the period 434,975 - --------- --------- Weighted average number of shares and common stock equivalents 4,326,778 3,765,352 --------- --------- --------- --------- Net income (loss) $ 222,000 $ (38,000) --------- --------- --------- --------- Net income (loss) per common share $ 0.05 $(0.01) ------ ------ ------ ------