EXHIBIT 11 CALPINE CORPORATION AND SUBSIDIARIES CALCULATION OF EARNINGS PER SHARE (UNAUDITED) THREE MONTHS ENDED NINE MONTHS ENDED SEPTEMBER 30, SEPTEMBER 30, ------------------ ------------------ 1996 1995 1996 1995 ------- ------- ------- ------- (in thousands, except per share amounts) NET INCOME ................................... $10,732 $ 4,965 $15,155 $ 5,263 ======= ======= ======= ======= PRIMARY EARNINGS PER SHARE Average number of common shares outstanding .. 11,044 10,388 10,606 10,388 Conversion of preferred stock ................ 2,179 -- 1,541 -- Common shares issuable upon exercise of stock options using the treasury method ....... 847 573 548 576 ------- ------- ------- ------- 14,070 10,961 12,695 10,964 ------- ------- ------- ------- Primary earnings per share ..... $ 0.76 $ 0.45 $ 1.19 $ 0.48 ======= ======= ======= ======= FULLY DILUTED EARNINGS PER SHARE Average number of common shares outstanding .. 11,043 10,388 10,606 10,388 Conversion of preferred stock ................ 2,179 -- 1,541 -- Common shares issuable upon exercise of stock options using the treasury method ....... 1,081 573 625 576 ------- ------- ------- ------- 14,303 10,961 12,772 10,964 ------- ------- ------- ------- Fully diluted earnings per share $ 0.75 $ 0.45 $ 1.19 $ 0.48 ======= ======= ======= ======= -29-