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used for liquids except for oil and beer (see the full list) 1.0 US bbl (120 L; 32 US gal; 26 imp gal) U.S.bbl U.S. bbl barrel: oilbbl bbl 42 US gal 1.0 bbl (0.16 m 3) US beer barrel: USbeerbbl (usbeerbbl) US bbl 1.0 US bbl (120 L; 31 US gal; 26 imp gal) U.S.beerbbl (usbeerbbl) U.S. bbl US gallon: USgal US gal
ounce: oz oz 1.0 oz (28 g) oz g; drachm: drachm (none) 1.0 drachm (1.8 g) drachm: dram (none) grain: gr gr equivalent to the troy grain 1.0 gr (0.065 g) Troy: troy pound: troy pound (none) 1.0 troy pound (0.82 lb; 0.37 kg) troy ounce: ozt ozt 1.0 ozt (1.1 oz; 31 g) pennyweight: dwt dwt 1.0 dwt (0.055 oz; 1.6 g) grain: gr gr equivalent to the ...
See Weight for detail of mass/weight distinction and conversion. Avoirdupois is a system of mass based on a pound of 16 ounces, while Troy weight is the system of mass where 12 troy ounces equals one troy pound. The symbol g 0 is used to denote standard gravity in order to avoid confusion with the (upright) g symbol for gram.
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The following is a comprehensive list of units used prior to the adoption of the metric system, along with the local names assigned to metric-based units after the system change. Over time, many traditional unit names were repurposed to denote metric-based units.
An imperial fluid ounce is 1 ⁄ 20 of an imperial pint, 1 ⁄ 160 of an imperial gallon, or exactly 28.4130625 mL. A US customary fluid ounce is 1 ⁄ 16 of a US liquid pint, 1 ⁄ 128 of a US gallon, or exactly 29.5735295625 mL, making it about 4.084% larger than the imperial fluid ounce. A US food labeling fluid ounce is exactly 30 mL.
One US fluid ounce is 1 ⁄ 16 of a US pint, 1 ⁄ 32 of a US quart, and 1 ⁄ 128 of a US gallon. The teaspoon, tablespoon, and cup are defined in terms of a fluid ounce as 1 ⁄ 6, 1 ⁄ 2, and 8 fluid ounces respectively.
An ounce-force is 1 ⁄ 16 of a pound-force, or about 0.2780139 newtons. It is defined as the force exerted by a mass of one avoirdupois ounce under standard gravity (at the surface of the earth, its weight). The "ounce" in "ounce-force" is equivalent to an avoirdupois ounce; ounce-force is a measurement of force using avoirdupois ounces.