AREA
	American System		Metric System
	Square Inch		6.452 cm2
	Square Foot	144 sq in	929.03 cm2
	Square Yard	3 sq ft	0.8361 m2
	Acre	4840 sq yd	0.4047 ha
	Square Mile	640 acres	2.590 km2
	Metric System		American System
	Square Centimetre [cm2 ]	100 mm2	0.1550 sq in
	Square Metre [m2 ]	10,000 cm2	1.1960 sq yd
	Hectare [ha]	10,000 m2	2.4711 acres
	Square Kilometre [km2 ]	100 ha	0.3861 sq mile