1

                                                                     Exhibit 12

                       W. R. GRACE & CO. AND SUBSIDIARIES

              COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND
            COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (a)
                          (in millions, except ratios)
                                   (Unaudited)



                                                                               Years Ended December 31, (c)
                                                              -----------------------------------------------------------
                                                              1997 (d)      1996 (e)     1995 (f)   1994 (g)     1993 (h)
                                                              -------       --------     --------   --------     --------
                                                                                                        
Net income/(loss) from continuing operations..............   $  88.2       $ 112.9     $ (324.8)    $ (185.4)     $(106.7)
    Add/(deduct):
    Provision for/(benefit from) income taxes.............      55.2          70.4       (192.4)      (120.9)       (55.5)

    Income taxes of 50%-owned companies...................        --            --           --           --           .1

    Equity in unremitted (earnings)/losses
      of less than 50%-owned companies....................      (7.0)          (.4)          .8          (.6)         (.5)

    Interest expense and related financing costs,
      including amortization of capitalized interest......      87.6         160.8        179.8        138.5        122.7

    Estimated amount of rental expense
      deemed to represent the interest factor.............       6.9           8.4          8.5         10.1         11.3
                                                             -------       -------     --------     --------      -------
Income/(loss) as adjusted.................................   $ 230.9       $ 352.1     $ (328.1)    $ (158.3)     $ (28.6)
                                                             =======       =======     ========     ========      =======

Combined fixed charges and preferred stock dividends:
    Interest expense and related financing costs,
      including capitalized interest......................   $  92.4       $ 177.1     $  195.5     $  143.2      $ 122.8
    Estimated amount of rental expense
      deemed to represent the interest factor.............       6.9           8.4          8.5         10.1         11.3
                                                             -------       -------     --------     --------      -------
Fixed charges.............................................      99.3         185.5        204.0        153.3        134.1
Preferred stock dividend requirements (b).................        --            .6           .5           .5           .8
                                                             -------       -------     --------     --------      -------
Combined fixed charges and preferred
    stock dividends.......................................   $  99.3       $ 186.1     $  204.5     $  153.8      $ 134.9
                                                             =======       =======     ========     ========      =======
Ratio of earnings to fixed charges........................      2.33          1.90       (i)          (i)            (i)  
                                                             =======       =======     ========     ========      =======
Ratio of earnings to combined fixed charges and
    preferred stock dividends.............................      2.33          1.89       (i)          (i)            (i)  
                                                             =======       =======     ========     ========      =======



     (a)  Grace's preferred stocks were retired in 1996; see Note 1 to the
          Consolidated Financial Statements.
     (b)  For each period with an income tax provision, the preferred stock
          dividend requirements have been increased to an amount representing
          the pretax earnings required to cover such requirements based on
          Grace's effective tax rate.
     (c)  Certain amounts have been restated to conform to the 1997
          presentation.
     (d)  Includes a pretax gain of $103.1 on sales of businesses, offset by a
          pretax provision of $47.8 for restructuring costs and asset
          impairments.
     (e)  Includes a pretax gain of $326.4 on sales of businesses, offset by
          pretax provisions of $229.1 for asbestos-related liabilities and
          insurance coverage and $34.7 for restructuring costs and asset
          impairments.
     (f)  Includes pretax provisions of $275.0 for asbestos-related liabilities
          and insurance coverage; $151.3 relating to restructuring costs, asset
          impairments and other activities; $77.0 for environmental liabilities
          at former manufacturing sites; and $30.0 for corporate governance
          activities.
     (g)  Includes a pretax provision of $316.0 relating to asbestos-related
          liabilities and insurance coverage.
     (h)  Includes a pretax provision of $159.0 relating to asbestos-related
          liabilities and insurance coverage.
     (i)  As a result of the losses incurred for the years ended December 31,
          1995, 1994 and 1993, Grace was unable to fully cover the indicated
          fixed charges.



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