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The only troy weight in widespread use is the British Imperial troy ounce and its American counterpart. Both are based on a grain of 0.06479891 gram (exact, by definition), with 480 grains to a troy ounce (compared with 437 + 1 ⁄ 2 grains for an ounce avoirdupois). The British Empire abolished the 12-ounce troy pound in the 19th century.
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.
The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement.Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.453 592 37 kilograms, and which is divided into 16 avoirdupois ounces. [1]
1.0 long qtr (28 lb; 13 kg) short quarter: short qtr short qtr 1.0 short qtr (25 lb; 11 kg) stone: st st 14 lb used mostly in the British Commonwealth except Canada 1.0 st (14 lb; 6.4 kg) st kg. st kg lb; st lb. st lb kg; pound: lb lb 1.0 lb (0.45 kg) lb kg. lb kg st; lb st. lb st kg; ounce: oz oz 1.0 oz (28 g) oz g; drachm: drachm (none) 1.0 ...
Avoirdupois (/ ˌ æ v ər d ə ˈ p ɔɪ z, ˌ æ v w ɑːr dj uː ˈ p w ɑː /; [1] abbreviated avdp.) [2] is a measurement system of weights that uses pounds and ounces as units. [ 3 ] [ 4 ] It was first commonly used in the 13th century AD and was updated in 1959.
The confusing variety of definitions and conversions for pounds and ounces is covered elsewhere in a table of pound definitions. To unify all weight systems used by apothecaries, the Irish pharmacopœia of 1850 introduced a new variant of the apothecaries' system which subdivided a new apothecaries' pound of 12 avoirdupois ounces instead of the ...
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Pound (lb) ≈453.6 g: 1 lb = 16 oz = 7000 grains ('lb' is an abbreviation for the Ancient Roman unit ... Metrication – Conversion to the metric system of measurement;