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Weight is measured in ounces and pounds (avoirdupois) as in the U.S. Volume is measured in imperial gallons, quarts, pints, fluid ounces, fluid drachms, and minims. The imperial gallon was originally defined as 10 pounds (4.5359 kg) of water in 1824, and refined as exactly 4.54609 litres in 1985.
ft⋅lb f: inch-pound force: inlbf in⋅lbf 1.0 in⋅lbf (110 mJ) inlb-f in⋅lb f: inch-ounce force: inozf in⋅ozf 1.0 in⋅ozf (7.1 mJ) inoz-f in⋅oz f: horsepower-hour: hph hp⋅h 1.0 hp⋅h (0.75 kWh) British thermal unit: British thermal unit: Btu Btu The International Steam Table British thermal unit is used. For others, see the full list.
The table of imperial avoirdupois mass is the same as the United States table up to one pound, but above that point, the tables differ. The imperial system has a hundredweight, defined as eight stone of 14 lb each, or 112 lb (50.802 345 44 kg), whereas a US hundredweight is 100 lb (45.359 237 kg). In both systems, 20 hundredweights make a ton.
Precious metals, for example, are often weighed in "troy ounces", because just "ounce" would be more likely to be assumed to mean an avoirdupois ounce. For the pound and smaller units, the U.S. customary system and the British imperial system are identical. However, they differ when dealing with units larger than the pound.
The apothecaries and troy pounds are divided into 12 ounces (of 480 grains) while the avoirdupois pound has 16 ounces (of 437.5 grains). The unit of volume, the gallon, has different values in the United States and in the United Kingdom – the US fluid gallon being about 0.83 imperial gallons and the US dry gallon being about 0.97 imperial ...
The former Weights and Measures office in Seven Sisters, London (590 Seven Sisters Road). The imperial system of units, imperial system or imperial units (also known as British Imperial [1] or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments.
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]
sixteenth of an ounce (possibly originated as the weight of silver in Ancient Greek coin drachma) Ounce (oz) ≈28.35 g: 1 oz = 16 dr = 437.5 grains Pound (lb) ≈453.6 g: 1 lb = 16 oz = 7000 grains ('lb' is an abbreviation for the Ancient Roman unit libra) Stone (st) 6.35 kg: 1 st = 14 lb (see Stone (unit) for other values) Quarter (qr) 12.7 kg