Exhibit 11 THERMO FIBERTEK INC. Computation of Earnings per Share Three Months Ended Nine Months Ended ------------------------ ------------------------- Sept. 27, Sept. 28, Sept. 27, Sept. 28, 1997 1996 1997 1996 - ------------------------------------------------------------------------------ Computation of Fully Diluted Earnings per Share: Income: Net income $ 3,594,000 $ 4,213,000 $10,813,000 $14,295,000 Add: Convertible debt interest, net of tax 30,000 79,000 188,000 237,000 ----------- ----------- ----------- ----------- Income applicable to common stock assuming full dilution (a) $ 3,624,000 $ 4,292,000 $11,001,000 $14,532,000 ----------- ----------- ----------- ----------- Shares: Weighted average shares outstanding 61,503,678 61,088,657 61,296,040 61,015,230 Add: Shares issuable from assumed conversion of subordinated convertible obligation 726,192 1,888,113 1,500,806 1,888,113 Shares issuable from assumed exercise of options (as determined by the application of the treasury stock method) 1,136,837 1,404,451 1,136,837 1,494,662 ----------- ----------- ----------- ----------- Weighted average shares outstanding, as adjusted (b) 63,366,707 64,381,221 63,933,683 64,398,005 ----------- ----------- ----------- ----------- Fully Diluted Earnings per Share (a) / (b) $ .06 $ .07 $ .17 $ .23 =========== =========== =========== ===========