1 EXHIBIT 11 NOVAMETRIX MEDICAL SYSTEMS INC. STATEMENT RE: COMPUTATION OF PER SHARE EARNINGS QUARTER ENDED QUARTER ENDED 08-03-97 07-28-96 -------- -------- Net Income $ 523,858 $ 647,874 ========== ========== PRIMARY EARNINGS PER SHARE: Weighted average number of shares of Common Stock outstanding 7,271,559 6,663,326 Net effect of dilutive common stock equivalents (1) 1,232,860 1,497,726 Total weighted average number of shares of Common Stock and dilutive common stock equivalents outstanding ---------- ---------- 8,504,419 8,161,052 Per common share amounts $ 0.06 $ 0.08 ========== ========== FULLY DILUTED EARNINGS PER SHARE: Weighted average number of shares of Common Stock outstanding 7,271,559 6,663,326 Net effect of dilutive common stock equivalents (1) 1,966,407 1,545,418 Total weighted average number of shares of Common Stock and dilutive common ---------- ---------- stock equivalents outstanding 9,237,966 8,208,744 Per common share amounts: $ 0.06 $ 0.08 ========== ========== (1) Common stock equivalents consist of the Company's Preferred Stock, stock options, warrants and shares subscribed under the Company's employee stock purchase plan. The computation of dilutive common stock equivalents is based on the if-converted method for the Preferred Stock and on the treasury stock method for the other common stock equivalents using the average market price for the primary earnings per share computations and the higher of average or period ending market price for the fully diluted earnings per share computations. Page 15 of 16