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In the standard system the conversion is that 1 gallon = 231 cubic inches and 1 inch = 2.54 cm, which makes a gallon = 3785.411784 millilitres exactly. For nutritional labeling on food packages in the US, the teaspoon is defined as exactly 5 ml, [22] giving 1 gallon = 3840 ml exactly. This chart uses the former.
1/4 imp gal or 40 imp fl oz 1.0 imp qt (1,100 ml; 38 US fl oz) imperial pint: imppt imp pt 1/8 imp gal or 20 imp fl oz 1.0 imp pt (0.57 L) imperial fluid ounce: impoz (impfloz) imp fl oz 1/160 imp gal 1.0 imp fl oz (28 ml; 0.96 US fl oz) impoz USoz; impoz U.S.oz; impoz ml; impoz mL; US customary liquid measure: US barrel: USbbl US bbl
Another difference arose when Britain abolished the troy pound (373.241 7216 g) on 1 January 1879, leaving only the troy ounce (31.103 4768 g) and its decimal subdivisions, whereas the troy pound (of 12 troy ounces) and pennyweight are still legal in the United States, although they are no longer widely used.
Vermilion (1706): "3 to 4 hundred weight" (i.e. 336-448 pounds) Camphor (1858): "130 Dutch lbs" In Newfoundland , Canada, a tub of coal was defined as 100 pounds, while a tub of herrings was 16 Imperial gallons and a tub of salt was 18 Imperial gallons.
The weights are in denominations of 7 pounds (corresponding to a unit known as the clip or wool-clip), 14 pounds (stone), 56 pounds (4 stone) and 91 pounds (1 ⁄ 4 sack or woolsack). [ 18 ] [ 19 ] The 91-pound weight is thought to have been commissioned by Edward III in conjunction with the statute of 1350, while the other weights are thought ...
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.
English-speaking countries also used a system of units of fluid measure, or in modern terminology volume units, based on the apothecaries' system. Originally, the terms and symbols used to describe the volume measurements of liquids were the same as or similar to those used to describe weight measurements of solids [33] (for example, the pound by weight and the fluid pint were both referred to ...
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.