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The British imperial gallon (frequently called simply "gallon") is defined as exactly 4.54609 dm 3 (4.54609 litres). [4] It is used in some Commonwealth countries, and until 1976 was defined as the volume of water at 62 °F (16.67 °C) [5] [6] whose mass is 10 pounds (4.5359237 kg).
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.
A baby bottle with measurements in metric, imperial and US customary A one-US-gallon petrol can purchased near the US–Canada border showing equivalents in imperial gallons and litres. Both the British imperial measurement system and United States customary systems of measurement derive from earlier English unit systems used prior to 1824 that ...
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 wine gallon was re-established by Queen Anne in 1707 after a 1688 survey found the Exchequer no longer possessed the necessary standard but had instead been depending on a copy held by the Guildhall. [citation needed] Defined as 231 cubic inches, it differs from the later imperial gallon, but is equal to the United States customary gallon ...
[nb 3] The Queen Anne wine gallon of 231 cubic inches was adopted in 1707 and still serves as the definition of the US gallon. A US tun is then the volume or of a rectangular cuboid with dimensions 36 by 38.5 by 42 inches. When the imperial system was introduced the tun was redefined in the UK and colonies as 210 imperial gallons.
From the mid 15th century until 1824 the beer hogshead was defined as 54 ale or beer gallons. hogshead (Ale) (Imperial), hogshead (Beer) (Imperial) In the United Kingdom and its colonies, with the 1824 adoption of the imperial system, the ale or beer hogshead was redefined to be 54 imperial gallons. The ale or beer hogshead is therefore exactly ...
It is a holdover from when spirits, wines and brandies, ale, and beer all had different standard measures of capacity. An Ale Gill (based on the Ale gallon) and a Beer Gill (based on the Beer gallon) were different sizes until standardized as Ale / Beer gallons in 1688, Beer gallons in 1803, and Imperial gallons in 1824. Half (imp.) 284 mL: 9.6 ...