EXHIBIT 11 CLX ENERGY, INC. Computation of Net Income (Loss) Per Share (Unaudited) Nine Months Three Months Ended June 30 Ended June 30 ------------------------------ -------------------- 2004 2003 2004 2003 --------------- ------------- --------- --------- Net income (loss) $ ( 16,880) 44,002 4,551 30,947 =============== ============= ========= ========= Weighted average number of common shares outstanding 2,631,936 2,631,936 2,631,936 2,631,936 Common equivalent shares representing shares issuable upon exercise of outstanding Options - - - - --------------- ------------- --------- --------- 2,631,936 2,631,936 2,631,936 2,631,936 =============== ============= ========= ========= Net income (loss) per share: Basic $ ( .01) .02 0.00 .01 =============== ============= ========= ========= Diluted $ ( .01) .02 0.00 .01 =============== ============= ========= ========= Stock options are not considered in the diluted EPS calculation for those periods with net losses, as the impact of the potential common shares (250,000 shares at June 30, 2004) would be to decrease loss per share.