Unit

Metric

English

acre

0.405 hectares

4,840 sq yards

atmosphere

760 torr (millimeters Hg)

14.7 pounds per inch²

barrel (oil, US)

159 liters

42 gallons (US)

British thermal unit (btu)

252.2 calories

1 pound water 1ºF

calorie

1 gram water 1ºC

3.965 x 10^-3 btu

carat

200 milligrams

0.007 ounce avdp

degrees, C

5/9 (Fº -32)

degrees, F

1.8 Cº + 32

foot

0.3048 meters

0.333 yards

foot, cubic

28.317 liters of water

7.472 gallons of water

gallon (US)

3.79 liters

8.355 pounds water

grams

0.001 kilogram

0.03527 ounces, avdp

hectare

10,000 sq meters;

11,960 sq yard

hectoliter

100 liters

26.42 gallons (US

hundredweight

45.36 kilograms

100 pounds, avdp

inch

25.4 millimeters

0.0278 yards

joule

0.23901 calories

9.4781 x 10^-4 btu

Kelvin (K)

ºC + 273.15

kilogram

1000 grams

2.2046 pounds, avdp

kilometer

1,000 meters

0.621 miles

kilometer, square

100 hectares

247 acres; 0.386 sq miles

liter

1000 grams water at 4ºC

1.06 quarts, liquid

meter

0.001 kilometer

39.3696 inches

meter, square

1.196 sq yards

32.292 sq feet

meter, cubic

1,000 liters

1.308 cu yards; 4 board feet

mile, nautical

1.852 kilometers

1.151 miles

mile (statute)

1.61 kilometers

1760 yards

mile,square

259 hectares

640 acres; 2.59 sq kilometers

millimeter

0.1 centimeters

0.03937 inches

ounce, avdp

28.349 grams

0.0625 pounds, avdp

pound, avdp

453.59 grams

16 ounces, avdp

quart (US)

0.946 liters

32 fluid ounces

ton, deadweight

1.016 metric tons

2,240 pounds, avd

ton, long

1.016 metric tons

2,240 pounds, avd

ton, metric

1,000 kilograms

2,205 pounds, avd

ton, register

2.83 cu meters

100 cu feet

ton, short

0.907 metric tons

2,000 pounds, avd

yard

0.914 meters

36 inches

yard, square

0.836 sq meters

9 sq feet

yard, cubic

0.765 cu meters

27 cu feet