British Imperial and U.S. Customary systems of weights and measures

unit abbreviation

or symbol equivalents in other units

of same system metric

equivalent

Weight

Avoirdupois¹ avdp

ton

short ton 20 short hundredweight, or 2,000 pounds 0.907 metric ton

long ton 20 long hundredweight, or 2,240 pounds 1.016 metric tons

hundredweight cwt

short hundredweight 100 pounds, or 0.05 short ton 45.359 kilograms

long hundredweight 112 pounds, or 0.05 long ton 50.802 kilograms

pound lb, lb avdp, or \\# 16 ounces, or 7,000 grains 0.454 kilogram

ounce oz, or oz avdp 16 drams, 437.5 grains, or 0.0625 pound 28.350 grams

dram dr, or dr avdp 27.344 grains, or 0.0625 ounce 1.772 grams

grain gr 0.037 dram, or 0.002286 ounce 0.0648 gram

stone st 0.14 short hundredweight, or 14 pounds 6.35 kilograms

Troy

pound lb t 12 ounces, 240 pennyweight, or 5,760 grains 0.373 kilogram

ounce oz t 20 pennyweight, 480 grains, or 0.083 pound 31.103 grams

pennyweight dwt, or pwt 24 grains, or 0.05 ounce 1.555 grams

grain gr 0.042 pennyweight, or 0.002083 ounce 0.0648 gram

Apothecaries'

pound lb ap 12 ounces, or 5,760 grains 0.373 kilogram

ounce oz ap 8 drams, 480 grains, or 0.083 pound 31.103 grams

dram dr ap 3 scruples, or 60 grains 3.888 grams

scruple s ap 20 grains, or 0.333 dram 1.296 grams

grain gr 0.05 scruple, 0.002083 ounce, or 0.0166 dram 0.0648 gram

Capacity

U.S. liquid measures

gallon gal 4 quarts 3.785 litres

quart qt 2 pints 0.946 litre

pint pt 4 gills 0.473 litre

gill gi 4 fluid ounces 118.294 millilitres

fluid ounce fl oz 8 fluid drams 29.573 millilitres

fluid dram fl dr 60 minims 3.697 millilitres

minim min ¹/₆₀ fluid dram 0.061610 millilitre

U.S. dry measures

bushel bu 4 pecks 35.239 litres

peck pk 8 quarts 8.810 litres

quart qt 2 pints 1.101 litres

pint pt ¹/₂ quart 0.551 litre

British liquid and dry measure

bushel bu 4 pecks 0.036 cubic metre

peck pk 2 gallons 0.0091 cubic metre

gallon gal 4 quarts 4.546 litres

quart qt 2 pints 1.136 litres

pint pt 4 gills 568.26 cubic centimetres

gill gi 5 fluid ounces 142.066 cubic centimetres

fluid ounce fl oz 8 fluid drams 28.412 cubic centimetres

fluid dram fl dr 60 minims 3.5516 cubic centimetres

minim min ¹/₆₀ fluid dram 0.059194 cubic centimetre

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 yards, 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 0.333 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 1,296 square inches, or 9 square feet 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 3.62 cubic metres

¹The U.S. uses avoirdupois units as the common system of measuring weight.