EXHIBIT 11 Washington Trust Bancorp, Inc. Computation of Per Share Earnings For the Three Months Ended March 31, 1997 and 1996 (Shares in thousands) 1997 1996 --------------- --------------- PRIMARY: Weighted average shares 4,366.3 4,259.0 Common stock equivalents 176.2 138.2 --------------- --------------- Primary weighted average shares 4,542.5 4,397.2 --------------- --------------- FULLY DILUTED: Weighted average shares 4,366.3 4,259.0 Common stock equivalents 176.1 141.3 --------------- --------------- Fully diluted weighted average shares 4,542.4 4,400.3 --------------- --------------- Net income $2,151 $2,009 --------------- --------------- Primary earnings per share $.47 $.46 --------------- --------------- Fully diluted earnings per share $.47 $.46 --------------- ---------------