Exhibit 12 MASCO CORPORATION AND CONSOLIDATED SUBSIDIARIES Computation of Ratio of Earnings to Fixed Charges (Thousands of Dollars) Nine Months Ended September 30, Year Ended December 31, 1998 1997 1996 1995 1994 1993 Earnings Before Income Taxes and Fixed Charges: Income from continuing operations before income taxes $570,200 $630,900 $502,700 $351,790 $292,830 $349,190 Deduct/add equity in undistributed (earnings)/loss of equity affiliates (17,280) (19,470) (12,310) (17,770) 106,200 (13,750) Add interest on indebtedness, net 64,380 80,390 74,790 73,400 60,360 62,860 Add amortization of debt expense 880 1,260 1,400 1,930 2,220 2,650 Add estimated interest factor for rentals 7,660 8,150 6,150 4,970 4,220 3,190 Earnings before income taxes and fixed charges $625,840 $701,230 $572,730 $414,320 $465,830 $404,140 Fixed Charges: Interest on indebtedness regarding continuing operations $ 66,620 $ 83,520 $ 77,250 $ 76,460 $ 63,220 $ 63,600 Amortization of debt expense 880 1,260 1,400 1,930 2,220 2,650 Estimated interest factor for rentals 7,660 8,150 6,150 4,970 4,220 3,190 $ 75,160 $ 92,930 $ 84,800 $ 83,360 $ 69,660 $ 69,440 Ratio of earnings to fixed charges 8.3 7.5 6.8 5.0 6.7 5.8