EXHIBIT 11 CLX ENERGY, INC. Computation of Net Income (Loss) Per Share (Unaudited) Three months ended December 31, -------------------------- 2002 2001 ------------ ------------ Net income (loss) $( 30,574) $( 78,594) ============ ============ Weighted average number of common shares outstanding 2,631,936 2,631,936 Common equivalent shares representing shares issuable upon exercise of outstanding options - - ------------ ------------ 2,631,936 2,631,936 ============ ============ Net income (loss) per share: Basic $( 0.01) $( 0.03) ============ ============ Diluted $( 0.01) $( 0.03) ============ ============ 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 December 31, 2002 and 2001) would be to decrease loss per share.