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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.
Loose tomatoes for sale at a UK greengrocer in 2013, dual-priced in imperial (£0.99 /lb) and metric (£2.18 /kg) units. Signs like these do not comply with legislation, as metric prices must not be less prominent. [1] [2] Metrication is the act or process of converting to the metric system of measurement.
1 fluid ounce of water weighs approximately 1 ounce so a recipe calling for a UK pint (20 fl oz) of water can be substituted with 20 oz of water. More accurate measurements become important in the large volumes used in commercial food production. Also, a home cook can use greater precision at times. Water at 4.0 °C (39.2 °F) may be ...
The Winchester measure was made obsolete in the British Empire but remained in use in the US. [c] The Winchester bushel was replaced with an imperial bushel of eight imperial gallons. The subdivisions of the bushel were maintained. As with US dry measures, the imperial system divides the bushel into 4 pecks, 8 gallons, 32 quarts or 64 pints.
In the U.K., the use of the fluid ounce as a measurement in trade, public health, and public administration was circumscribed to a few specific uses (the labelling of beer, cider, water, lemonade and fruit juice in returnable containers) in 1995, and abolished entirely in 2000, by The Units of Measurement Regulations 1994. [6]
In antiquity, systems of measurement were defined locally: the different units might be defined independently according to the length of a king's thumb or the size of his foot, the length of stride, the length of arm, or maybe the weight of water in a keg of specific size, perhaps itself defined in hands and knuckles. The unifying ...
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A US liquid gallon contains 3.785411784 kilograms (8.3454 lb) of water at 3.98 °C (39.16 °F), and is 83.26742% of an imperial gallon. There are four quarts in a gallon, two pints in a quart and 16 US fluid ounces in a US pint , making the US fluid ounce 1 / 128 of a US gallon.