CHESAPEAKE UTILITIES CORPORATION AND SUBSIDIARIES EXHIBIT 11 COMPUTATION OF PRIMARY AND FULLY DILUTED EARNINGS PER SHARE For the Quarter Ended March 31, ------------------------ 1997 1996 ---- ---- Primary earnings per share calculation: Weighted average number of shares 4,475,839 4,399,372 ======================== Consolidated net income $3,366,113 $6,000,157 ======================== Primary earnings per share $0.75 $1.36 ======================== Fully diluted earings per share calculation: Weighted average number of shares 4,475,839 4,399,372 Contingent shares related to assumed conversion of convertible debt 240,704 245,359 ------------------------ Weighted average number of shares assuming full dilution 4,716,543 4,644,731 ======================== Adjusted income Consolidated net income $3,366,113 $6,000,157 Interest on convertible debt 83,302 85,621 Less: Applicable income taxes (32,488) (33,392) ------------------------ Adjusted net income $3,481,903 $6,119,170 ======================== Fully diluted earnings per share $0.74 $1.32 ========================