Potash Corporation of Saskatchewan (POT) 10-K 2006 FY Annual report

Exhibit 11

POTASH CORPORATION OF SASKATCHEWAN INC.
COMPUTATION OF PER SHARE EARNINGS
FOR THE YEARS ENDED DECEMBER 31

	2006			2005
A   Net income as reported, Canadian GAAP ($ millions)		631.8			542.9
B   Items adjusting net income ($ millions)		(6.0	)		(10.2	)
C   Net income, U.S. GAAP ($ millions)		625.8			532.7
D   Weighted average number of shares outstanding		103,960,000			108,568,000
E   Net additional shares issuable for diluted earnings per share calculation (Canadian GAAP)		2,270,000			2,510,000
F   Net additional shares issuable for diluted earnings per share calculation (U.S. GAAP)		2,263,000			2,510,000
CANADIAN GAAP
Basic earnings per share (A/D)		6.08			5.00
Diluted earnings per share (A/(D+E))		5.95			4.89
UNITED STATES GAAP
Basic earnings per share (C/D)		6.02			4.91
Diluted earnings per share (C/(D+F))		5.89			4.80