Exhibit 11


                AIRGAS, INC. AND SUBSIDIARIES
               EARNINGS PER SHARE CALCULATIONS
      For the Years Ended March 31, 2001, 2000 and 1999


                                               Years Ended March 31,
                                           2001         2000         1999
                                                        
Weighted Average Shares Outstanding:
- ------------------------------------
Basic shares outstanding                66,000,000   69,200,000   70,000,000
Net common stock equivalents             1,200,000    1,400,000    1,700,000
                                        ----------   ----------   ----------
Diluted shares outstanding              67,200,000   70,600,000   71,700,000
                                        ==========   ==========   ==========

Net earnings                           $28,223,000  $38,283,000  $51,924,000
                                       ===========  ===========  ===========

Basic earnings per share               $       .43  $       .55  $       .74
                                       ===========  ===========  ===========

Diluted earnings per share             $       .42  $       .54  $       .72
                                       ===========  ===========  ===========