FROM	TO	MULTIPLY BY
sq. millimetres	sq. inches	0.00155
sq. inches	sq. millimetres	645.16
sq. centimetres	sq. inches	0.155
sq. inches	sq. centimetres	6.452
sq. metres	sq. feet	10.76
sq. feet	sq. metres	0.0929
sq. metres	sq. yards	1.196
sq. yards	sq. metres	0.835
sq. kilometres	sq. miles	0.3861
sq. miles	sq. kilometres	2.59
hectacres	acres	2.471
acres	hectacres	0.4047