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                                                                    Exhibit 11.0

                             BTU INTERNATIONAL, INC.
        CALCULATION OF NET INCOME PER COMMON AND COMMON EQUIVALENT SHARE
             (Dollars in thousands, except share and per share data)


                                              FOR THE THREE MONTHS ENDED      FOR THE SIX MONTHS ENDED
                                           -------------------------------  -----------------------------
                                              July 1,          July 2,          July 1,       July 2,
                                               2001             2000             2001          2000
- ---------------------------------------------------------------------------------------------------------
                                                                                  
Net (loss) income                           $(1,568)            $1,451         $(1,491)        $2,607
- ---------------------------------------------------------------------------------------------------------
Net (loss) income applicable to
  common stockholders                       $(1,568)            $1,451         $(1,491)        $2,607
=========================================================================================================

Weighted average number of
  shares outstanding:

     Basic Shares                         6,966,509          6,869,417       6,952,798      6,849,262
     Effect of Dilutive Options                   0            453,616               0        448,998
- ---------------------------------------------------------------------------------------------------------

     Diluted Shares                       6,966,509          7,323,033       6,952,798      7,298,260
=========================================================================================================
Earnings per Share

     Basic                                   $(0.23)             $0.21           (0.21)         $0.38

     Diluted                                 $(0.23)             $0.20           (0.21)         $0.36
=========================================================================================================