list of weights and measures

This is a list of weights and measures, arranged by type of unit. The measurement system in which it is used is also given as well as metric and U.S. Customary equivalents.

Units of area

• acre (U.S. Customary and British Imperial, 4,047 square meters [43,560 square feet])
• are (metric, 100 square meters [0.0247 acre])
• hectare (metric, 10,000 square meters [2.471 acres])
• mou (Chinese, 666.5 square meters [0.17 acre])

Units of capacity

• amphora (ancient Roman, 27.84 liters [7.36 gallons]; Greek, about 34 liters [9 gallons])
• barrel (U.S. Customary and British Imperial [dry], 115.63 liters [26 gallons])
• bat (ancient Hebrew, about 37 liters [6.5 gallons])
• bushel (U.S. Customary, 36.375 liters [9.6 gallons]; British Imperial, 8 gallons])
• fluid ounce (U.S. Customary, 29.57 ml; British Imperial, 28.41 ml)
• metrētēs (ancient Greek, U.S. Customary, 39.4 liters [10.4 gallons]; British Imperial, 9 gallons)
• peck (U.S. Customary, dry, 8.81 liters; British Imperial, 9.092 liters
• pint (U.S. Customary: dry, 0.5506 liter; liquid, 0.4732 liter; British Imperial, 0.56826 liter)
• quart (U.S. Customary: dry, 1.10122 liters; liquid, 0.94635 liter; British Imperial, 1.13652 liters)

Units of energy

• British thermal unit (BTU) (1,055 joules)
• quad (293 billion kilowatt-hours [one quadrillion BTUs])

Units of length

• angstrom (metric, 10^-10 meter [3.9 ⨉ 10^-9 inches])
• cubit (ancient, usually about 45.7 cm [18 inches])
• finger (ancient and medieval, 11.4 cm [4.5 inches])
• hand (ancient, 10.16 cm [4 inches])
• inch (U.S. Customary and British Imperial, 2.54 cm)
• micrometer (metric, 0.000039 inch)
• mile (U.S. Customary and British Imperial, 1.609 km)
• rod (old English, 5.029 meters [16.5 feet])
• zhang (ancient Chinese, 3.58 meters [11.75 feet])

Unit of pressure

• pascal (metric, 0.00014 pound per square inch)

Unit of power

• horsepower (British Imperial, 746 watts [33,000 foot-pounds per minute])

Unit of speed

• knot (navigation, 1.85 km [1.15 miles, or 1 nautical mile] per hour)

Units of volume

• cord (American, 3.62 cubic meters [128 cubic feet])
• cup (U.S. Customary, 236.59 cc; British Imperial, 284.14 cc)
• gill (U.S. Customary, 118.29 cc; British Imperial, 142.07 cc)
• qa (ancient Babylonian, about 1,000 cc [61 cubic inches])
• stere (metric, 1 cubic meter [35.3 cubic feet])

Units of weight

• dram (apothecaries’, 3.888 grams, avoirdupois, 1.772 grams)
• fathom (English, 1.83 meters [6 feet])
• foot (U. S. Customary and British Imperial, 30.48 cm)
• furlong (English, 201.2 meters [660 feet])
• grain (avoirdupois, U.S. Customary, and British Imperial, 0.065 gram)
• gram (metric, 0.035 ounce)
• league (European, 3.9 to 7.4 km [2.4 to 4.6 miles])
• libra (Roman, 0.329 kg [0.722 pound])
• mina (Babylonian, about 640 grams [23 ounces], also 978 grams [34 ounces]; Hebrew, about 500 grams [17.6 ounces]; Greek, 431 grams [15 ounces])
• ounce (U.S. Customary and British Imperial: avoirdupois, 28.35 grams; troy and apothecaries’, 31.103 grams)
• pound (U.S. Customary: avoirdupois, 453.6 grams; troy, 373.2 grams)
• scruple (apothecaries’, 1.296 grams)
• shi (Chinese: ancient, about 60 kg [132 pounds]; modern, 71.68 kg [157.89 pounds])
• stone (British Imperial, avoirdupois, 6.35 kg [14 pounds])
• talent (Hebrew, about 30 kg [66.1 pounds]; Greek, about 25.8 kg [56.9 pounds])
• ton (U.S. Customary, 907.18 kg [2,000 pounds]; British Imperial, 1,016.05 kg [2,240 pounds]; metric, 1,000 kg [2,204.6 pounds])