Footage

1 inch = 2.540 sm

1 foot = 30.480sm 0.305m
1 yds = 0.914m
1 chain = 20.117m
1 miles = 1.609km

Unit Area
1 square inch = 0.0006m2

1 square feet = 0.093m2
1 square yds = 0.836m2
1 square chain = 404.685m2
1 acres = 0.405 ha
1 square miles = 2.589 km2