CHESAPEAKE UTILITIES CORPORATION AND SUBSIDIARIES EXHIBIT 11 COMPUTATION OF PRIMARY AND FULLY DILUTED EARNINGS PER SHARE FOR THE QUARTER FOR THE SIX MONTHS ENDED JUNE 30, (1) ENDED JUNE 30, ------------------------ ------------------------ 1997 1996 1997 1996 ---- ---- ---- ---- Primary earnings per share calculation: Weighted average number of shares 4,486,966 4,428,860 4,481,467 4,414,307 ======================== ======================== Consolidated net income $692,841 $486,311 $4,058,953 $6,486,468 ======================== ======================== Primary earnings per share $0.15 $0.11 $0.91 $1.47 ======================== ======================== Fully diluted earings per share calculation: Weighted average number of shares 4,486,966 4,428,860 4,481,467 4,414,307 Contingent shares related to assumed conversion of convertible debt 240,137 242,761 240,339 244,059 ------------------------ ------------------------ Weighted average number of shares assuming full dilution 4,727,103 4,671,621 4,721,806 4,658,366 ======================== ======================== Adjusted net income Consolidated net income $692,841 $486,311 $4,058,953 $6,486,468 Interest on convertible debt 84,030 84,715 167,275 170,338 Less: Applicable federal income taxes (32,772) (33,039) (65,237) (66,432) ------------------------ ------------------------ Adjusted net income $744,099 $537,987 $4,160,991 $6,590,374 ======================== ======================== Fully diluted earnings per share $0.16 $0.12 $0.88 $1.41 ======================== ======================== (1) This calculation is submitted in accordance with Regulation S-K item 601(b)(11), although it is contrary to paragraph 40 of APB Opinion No. 15, because it produces an anti-dilutive result for the quarters ended June 30, 1997 and 1996.