1 8X8, INC. EXHIBIT 11.1 CALCULATION OF PRO FORMA NET INCOME (LOSS) PER SHARE (In thousands, except per share amounts) (unaudited) Quarter ended June 30, --------------------- 1997 1996 --------- --------- Pro forma weighted average common and common equivalent shares: Preferred stock................... 3,726 3,147 Common stock...................... 6,976 4,784 Common stock options.............. 1,281 3,613 ------- ------- 11,983 11,544 ======= ======= Net income (loss)..................... $ 3,418 $(7,574) ======= ======= Pro forma net income (loss) per share. $ 0.29 $ (0.66) ======= ======== 24