Exhibit 11.1 Castle Energy Corporation Statement of Computation of Earnings Per Share (Dollars in thousands, except per share amounts) (Unaudited) Three Months Ended December 31, --------------------------------------------------------------------- 1997 1996 ----------------------------- ------------------------------ Basic Diluted Basic Diluted ------------ ------------ ------------ ------------ I. Shares Outstanding, Net of Treasury Stock Purchased During the Period: Stock, net 4,715,546 4,715,546 6,693,646 6,693,646 Purchase of treasury stock (weighted) (960) (960) (1,865) (1,865) ------------ ------------ ------------ ------------ 4,714,586 4,714,586 6,691,781 6,691,781 II. Weighted Equivalent Shares: Assumed options and warrants exercised 31,104 25,696 ------------ ------------ ------------ ------------ III. Weighted Average Shares and Equivalent Shares 4,714,546 4,745,690 6,691,781 6,717,477 ============ ============ ============ ============ IV. Net Income $ 2,822 $ 2,822 $ 2,236 $ 2,236 ============ ============ ============ ============ V. Net Income Per Share $ .60 $ .59 $ .33 $ .33 ============ ============ ============ ============