Exhibit (11) OWENS CORNING AND SUBSIDIARIES COMPUTATION OF PER SHARE EARNINGS Quarter Ended March 31, 1997 1996 (In millions of dollars except share data) Primary: Net income $ 42 $ 39 Weighted average number of shares outstanding (thousands) 52,761 51,490 Weighted average common equivalent shares (thousands): Deferred awards 15 15 Stock options using weighted average market price 689 796 Primary weighted average number of common shares outstanding and common equivalent shares (thousands) 53,465 52,301 Primary per share amount $ .79 $ .75 Fully Diluted: Net income $ 44 $ 41 Weighted average number of shares outstanding (thousands) 52,761 51,490 Weighted average common equivalent shares (thousands): Deferred awards 15 15 Stock options using the higher of average market price or market price at end of period 760 821 Shares from assumed conversion of preferred securities 4,566 4,566 Fully diluted weighted average number of common shares outstanding and common equivalent shares (thousands) 58,102 56,892 Fully diluted per share amount $ .76 $ .73