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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]
The stone or stone weight (abbreviation: st.) [ 1] is an English and British imperial unit of mass equal to 14 avoirdupois pounds (6.35 kg). [ nb 1] The stone continues in customary use in the United Kingdom and Ireland for body weight . England and other Germanic -speaking countries of Northern Europe formerly used various standardised "stones ...
A dram is 1 ⁄ 16 of an ounce ounce (oz) 1 ⁄ 16: 28.349 523 125 g: An ounce is 1 ⁄ 16 of a pound pound (lb) 1 0.453 592 37 kg: Defined by the Units of Measurement Regulations 1994 (SI 1994/2867) [33] stone (st) 14 6.350 293 18 kg: The plural stone is often used when providing a weight (e.g. "this sack weighs 8 stone"). [34]
Troy ounce is a traditional unit of gold weight. One-troy-ounce (480 gr; 31 g) samples of germanium, iron, aluminium, rhenium and osmium. A Good Delivery silver bar weighing 1,000 troy ounces (83 troy pounds; 31 kg) Troy weight is a system of units of mass that originated in 15th-century Kingdom of England [ 1] and is primarily used in the ...
Length. For measuring length, the U.S. customary system uses the inch, foot, yard, and mile, which are the only four customary length measurements in everyday use. From 1893, the foot was legally defined as exactly 1200⁄3937 m (approximately 0.304 8006 m ). [ 13] Since July 1, 1959, the units of length have been defined on the basis of 1 yd ...
[1] The long or imperial hundredweight of 8 stone or 112 pounds (50.80 kg) is defined in the British imperial system. [2] Under both conventions, there are 20 hundredweight in a ton, producing a "short ton" of 2,000 pounds (907.2 kg) and a "long ton" of 2,240 pounds (1,016 kg).
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.
Such scales are used to make the most accurate of fine measurements, such as in the needs of empirical chemistry. Avoirdupois ( / ˌævərdəˈpɔɪz, ˌævwɑːrdjuːˈpwɑː /; [ 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 ...