| unit | abbreviation
or symbol |
equivalents in other units
of same system |
metric
equivalent |
| Weight | |||
| avoirdupois | avdp | ||
| ton | 2,000 pounds | 0.907 metric | |
| hundredweight | cwt | 100 pounds | 45.359 kilograms |
| pound | lb, lb avdp or # | 16 ounces | 0.454 kilogram |
| ounce | oz, or oz avdp | 1/16 of a pound | 28.350 grams |
|
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| Capacity | |||
| US liquid measures | |||
| gallon | gal | 4 quarts or 8 pints or 128 ounces | 3.785 liters |
| quart | qt | 2 pints or 32 ounces | 0.946 liter |
| pint | pt | 1/2 quart or 16 ounces | 0.473 liter |
| fluid ounce | fl oz | 1/16 of a pint | 29.573 milliliters |
| U.S. dry measures | |||
| bushel | bu | 4 pecks | 35.239 liters |
| peck | pk | 8 quarts | 8.810 liters |
| quart | qt | 2 pints | 1.101 liter |
| pint | pt | 1/2 quart (a pint is half a quart) | 0.551 liter |
| UK liquid and dry measure | |||
| bushel | bu | 4 pecks | 0.036 cubic metre |
| peck | pk | 2 gallons | 0.0091 cubic metre |
| gallon | gal | 4 quarts (compare US gallon) | 4.546 liters |
| quart | qt | 2 pints (2 pints make 1 quart) | 1.136 litres |
| pint | pt | ||
| fluid ounce | fl oz | 1/20 of a pint or 8 fluid drams | 28.412 cubic centimetres |
| fluid dram | fl dr | 60 minims | 3.5516 cubic centimetres |
| Length | |||
| nautical mile | nmi | 6,076 feet or 1.151 miles | 1,852 metres |
| mile | mi | 5,280 feet, 1,760 yards or 320 rods | 1.609 kilometres |
| furlong | fur | 660 feet, 220 yards or 1/8 mile | 201 metres |
| rod | rd | 5.50 yard or 16.5 feet | 5.029 metres |
| fathom | fth | 6 feet or 72 inches | 1.829 metres |
| yard | yd | 3 feet or 36 inches | 0.9144 metre |
| foot | ft or ' | 12 inches or 1/3 of a yard | 30.48 centimetres |
| inch | in or " | 0.083 foot or 0.028 yard | 2.54 centimetres |
| Area | |||
| square mile | sq mi or mi2 | 640 acres or 102,400 square rods | 2.590 square kilometres |
| acre | 4,840 square yards or 43,560 square feet | 0.405 hectare, or 4,047 square metres | |
| square rod | sq rd or rd2 | 30.25 square yards or 0.00625 acre | 25.293 square metres |
| square yard | sq yd or yd2 | 9 square feet or 1,296 square inches | 0.836 square metre |
| square foot | sq ft or ft2 | 144 square inches or 0.111 square yard | 0.093 square metre |
| square inch | sq in or in2 | 0.0069 square foot or 0.00077 square yard | 6.452 square centimetres |
| Volume | |||
| cubic yard | cu yd or yd3 | 27 cubic feet or 46,656 cubic inches | 0.765 cubic metre |
| cubic foot | cu ft or ft3 | 1,728 cubic inches or 0.0370 cubic yard | 0.028 cubic metre |
| cubic inch | cu in or in3 | 0.00058 cubic foot or 0.000021 cubic yard | 16.387 cubic centimetres |
| acre-foot | ac ft | 43,560 cubic feet or 1,613 cubic yards | 1,233 cubic metres |
| board foot | bd ft | 144 cubic inches or 1/12 cubic foot | 2.36 litres |
| cord | cd | 128 cubic feet (often firewood) | 3.62 cubic metres |
| 1The U.S. uses avoirdupois units as the common system of measuring weight. | |||