Length

inches (in)

2.540

centimeters (cm)

0.0254

meters (m)

feet (ft)

0.3048

m

12

in

yard (yd)

0.9144

m

3

ft

miles

1.609

kilometers (km)

1760

yd

5280

ft

Area

square inch (sq in, in ²)

6.452

square centimeters (cm ²)

square feet (sq ft, ft ²)

0.0929

m ²

144

in ²

acre (a)

4047

square meters (m ²)

0.4047

hectare (ha)

43,560

ft ²

0.001562

square miles

square miles (mi ²)

2.590

km ²

640

acres

Volume

cubic feet (ft ³)

28.32

liters (L)

0.02832

m ³

7.48

US gallons (gal)

6.23

Imperial gallons

1728

cubic inches (in ³)

cubic yard (yd ³)

0.7646

m ³

gallon (gal)

3.785

L

0.003785

m ³

4

quarts (qt)

8

pints (pt)

128

fluid ounces (fl oz)

0.1337

ft ³

quart (qt)

32

fl oz

946

milliliters (mL)

0.946

L

acre-feet (ac ft)

1.233 10 ^{? 3}

cubic hectometers (hm ³)

1233

m ³

1613.3

cubic yard

Weight

pound (lb, #)

453.6

grams (gm or g)

0.4536

kilograms (kg)

7000

grains (gr)

16

ounces (oz)

grain

0.0648

g

ton (short)

2000

lb

0.9072

tonnes (metric tons)

ton (long)

2240

lb

gallons of water (US)

8.34

lb

Imperial gallon