Crown Cork & Seal Company, Inc. Exhibit 11 Computation of Earnings per Common Share (in millions except per share data) Three months ended March 31, March 31, 1997 1996 Line 1 Net income available to common shareholders $33.1 $29.1 2 Weighted average number of common shares outstanding during period 128.5 105.1 3 Net shares issuable upon exercise of dilutive outstanding stock options .7 .3 4 Weighted average convertible preferred stock* 11.3 4.4 5 Preference dividends $ 5.9 $ 2.2 6 Primary earnings per common share $0.26 $0.28 7 Fully diluted earnings per common share** $0.26 $0.28 * Preferred shares are convertible into common stock (at the discretion of the holder) at a rate of .911. For 1996 this assumed conversion is averaged from the issuance date of February 26, 1996. ** The 4.5% cumulative convertible preferred stock and the related dividends were excluded from the calculation of first quarter 1997 and 1996 fully diluted earnings per share as they were anti-dilutive.