24 EXHIBIT 11 AIRGAS, INC. EARNINGS PER SHARE CALCULATIONS Three Months Ended June 30, 1997 1996 ____ ____ Adjustment of Weighted Average Shares Outstanding: Shares of common stock outstanding - - weighted 66,809,000 64,239,000 Net common stock equivalents 2,611,000 2,856,000 __________ __________ Adjusted shares outstanding 69,420,000 67,095,000 ========== ========== Net earnings $12,226,000 $11,150,000 ========== ========== Earnings Per Share $ .18 $ .17 ========== ========== Earnings per share amounts were determined using the treasury stock method. This method assumes the exercise of all dilutive outstanding options and warrants and the use of the aggregate proceeds therefrom to acquire the Company's outstanding common stock. Net earnings were divided by the weighted average number of shares outstanding adjusted for the assumed exercise of the options and warrants outstanding and repurchase of common stock to calculate per share amounts. 25