1
sq. inch
=
645.16
sq. mm
0.002
sq. foot
0.093
sq. metres
10.764
sq. yard
0.836
1.196
sq. mile
2.59
sq. kilometres
0.386
acre
43,560
sq. feet
0.000023
acres
0.405
hectares
hectare
2.471
10000
sq. metre
0.0001
sq. kilometre
1000000
0.000001
sq. centimetres
sq. millimetres
sq. centimetre
100
0.01