list of weights and measures Actions Cite verifiedCite While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions. Select Citation Style MLA APA Chicago Manual of Style Copy Citation Share Share Share to social media Facebook X URL https://www.britannica.com/science/list-of-weights-and-measures Give Feedback Feedback Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login). Feedback Type Select a type (Required) Factual Correction Spelling/Grammar Correction Link Correction Additional Information Other Your Feedback Submit Feedback Thank you for your feedback Our editors will review what you’ve submitted and determine whether to revise the article.

　　Print print Print Please select which sections you would like to print: Table Of Contents Cite verifiedCite While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions. Select Citation Style MLA APA Chicago Manual of Style Copy Citation Share Share Share to social media Facebook X URL https://www.britannica.com/science/list-of-weights-and-measures Feedback Written and fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors. The Editors of Encyclopaedia Britannica Last Updated: Sep 5, 2024 • Article History Table of Contents 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 literspint (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])