EXHIBIT 11

                               CANTEL INDUSTRIES, INC.

                          COMPUTATION OF EARNINGS PER SHARE


                                               Three Months Ended
                                                   October 31,
                                                  1997       1996  
                                               ---------  ---------
           PRIMARY

Weighted average number of
  shares outstanding                           4,166,322  3,891,803
Dilutive effect of options and         
  warrants using the treasury        
  stock method and average 
  market price for the period                    216,523    429,339    
                                               ---------  ---------

Weighted average number of       
  shares and common stock
  equivalents                                  4,382,845  4,321,142    
                                               ---------  ---------
                                               ---------  ---------


Net income                                     $ 293,000  $ 222,000    
                                               ---------  ---------
                                               ---------  ---------

Earnings per common share                         $ 0.07     $ 0.05
                                               ---------  ---------
                                               ---------  ---------

     FULLY DILUTED
                                    
Weighted average number of
  shares outstanding                           4,166,322  3,891,803

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                    245,400    434,975
                                               ---------  ---------
                                  
Weighted average number of            
  shares and common stock
  equivalents                                  4,411,722  4,326,778
                                               ---------  ---------
                                               ---------  ---------


Net income                                     $ 293,000  $ 222,000
                                               ---------  ---------
                                               ---------  ---------


Earnings per common share                         $ 0.07     $ 0.05
                                               ---------  ---------
                                               ---------  ---------