EXHIBIT 11 EVANS & SUTHERLAND COMPUTER CORPORATION EARNINGS PER SHARE CALCULATION Unaudited (In thousands except per share amounts) Three Months Ended Nine Months Ended -------------------------------- ------------------------------- September 26, September 27, September 26, September 27, 1997 1996 1997 1996 --------------- --------------- -------------- -------------- Net earnings applicable to common stock $ 3,825 $ 3,286 $ 7,211 $ 5,534 =============== =============== ============== ============== Primary shares outstanding: Weighted average number of common shares outstanding 9,056 9,025 9,047 8,907 Common equivalent shares outstanding 541 232 430 299 --------------- --------------- -------------- -------------- Weighted average common and common equivalent shares outstanding 9,597 9,257 9,477 9,206 =============== =============== ============== ============== Fully diluted shares outstanding: Weighted average number of common shares outstanding 9,056 9,025 9,047 8,907 Common equivalent shares outstanding 675 270 675 329 --------------- --------------- -------------- -------------- Weighted average common and common equivalent shares outstanding 9,731 9,295 9,722 9,236 =============== =============== ============== ============== Primary net earnings per common and common equivalent share outstanding $ 0.40 $ 0.35 $ 0.76 $ 0.60 =============== =============== ============== ============== Fully diluted net earnings per common and common equivalent share outstanding $ 0.39 $ 0.35 $ 0.74 $ 0.60 =============== =============== ============== ============== 11