| U.S. System |
Metric Equivalent |
| Length |
| Unit |
Abbreviation |
Equivalents in
Other Units |
|
| Mile |
mi |
5280 feet, 320 rods, 1760 yards |
1,609 kilometers |
| Rod |
rd |
5.50 yards, 16.5 feet |
5.029 meters |
| Yard |
yd |
3 feet, 36 inches |
0.914 meters |
| Foot |
ft or ‘ |
12 inches, 0.333 yards |
30,480 centimeters |
| Inch |
in or “ |
0.083 feet, 0.027 yards |
2.540 centimeters |
| Area |
| Square Mile |
sq mi or m 2 |
640 acres, 102,400 square rods |
2,590 square kilometers |
| Acre |
a |
4840 square yards, 43,560 square feet |
0.405 hectares, 4047 square meters |
| Square Rod |
sq rd or rd 2 |
30.25 square yards, 0.006 acres |
25.293 square meters |
| Square Yard |
sq yd or yd 2 |
1296 square inches, 9 square feet |
0.836 square meters |
| Square Foot |
sq ft or ft 2 |
144 square inches, 0.111 square yards |
0.093 square meters |
| Square Inch |
sq in or in 2 |
0.007 square feet, 0.00077 square yards |
6.451 square centimeters |
| Volume |
| Cubic Yard |
cu yd or yd 3 |
27 cubic feet, 46,656 cubic inches |
0.765 cubic meters |
| Cubic Foot |
cu ft or ft 3 |
1728 cubic inches, 0.0370 cubic yards |
0.028 cubic meters |
| Cubic Inch |
cu in or in 3 |
0.00058 cubic feet, 0.000021 cubic
yards |
16.387 cubic centimeters |
| Mass& Weight |
| Ton |
tn (seldom used) |
|
|
| short ton |
|
20 short hundredweight, 2000 pounds |
0.907 metric tons |
| long ton |
|
20 long hundredweight, 2240 pounds |
1.016 metric tons |
| Hundredweight |
cwt |
|
|
| short hundredweight |
|
100 pounds, 0.05 short tons |
45.359 kilograms |
| long hundredweight |
|
112 pounds, 0.05 long tons |
50.802 kilograms |
| Pound |
lb or lb av also # |
16 ounces, 7000 grains |
0.453 kilograms |
| Ounce |
oz or oz av |
16 drams, 437.5 grains |
28.349 grams |
| Dram |
dr or dr av |
27.343 grains, 0.0625 ounces |
1.771 grams |
| Grain |
gr |
0.036 drams, 0.002285 ounces |
0.0648 grams |
| Capacity |
| Unit |
Abbreviation |
U.S. Liquid Measure |
|
| Gallon |
gal |
4 quarts (231 cubic inches) |
3.785 liters |
| Quart |
qt |
2 pints (57.75 cubic inches) |
0.946 liters |
| Pint |
pt |
4 gills (28.875 cubic inches) |
0.473 liters |
| Gill |
gi |
4 fluidounces (7.218 cubic inches) |
118.291 milliliters |
| Fluidounce |
fl oz |
8 fluidrams (1.804 cubic inches) |
29.573 milliliters |
| Fluidram |
fl dr |
60 minums (0.225 cubic inches) |
3.696 milliliters |
| Minim |
min |
1/60 fluidram (0.003759 cubic inches) |
0.061610 milliliters |
| Power |
| Unit |
Abbreviation |
|
| Horsepower |
hp |
0.746 kilowatt |
| Heat |
| British thermal unit |
BTU |
0.293 watt |
| Pressure or Vacuum |
| Pounds per square inch |
psi |
6.895 kilopascal |
| Torque |
| ounce inch |
oz/in. |
0.007 newton-meters |
| pound inch |
lb/in. |
0.113 newton-meters |
| pound foot |
lb/ft |
1.346 newton-meters |
| Temperature |
| Fahrenheit |
°F |
(°F – 32) 0.556 = °C |
