The Winchester bushel was replaced with an imperial bushel of eight imperial gallons. The Winchester measure was made obsolete in the British Empire but remained in use in the US. Originally defined as the volume of 10 pounds (4.54 kg) of distilled water (under certain conditions), then redefined by the Weights and Measures Act 1985 to be exactly 4.546 09 L (277.4 cu in), the imperial gallon is close in size to the old ale gallon. In 1824, these units were replaced with a single system based on the imperial gallon. Wine was measured with units based on the wine gallon of 231 cubic inches (3.785 L), beer was measured with units based on an ale gallon of 282 cubic inches (4.621 L) and grain was measured with the Winchester measure with a gallon of approximately 268.8 cubic inches (one eighth of a Winchester bushel or 4.405 L). The imperial system has only one set defined independently of, and subdivided differently from, its US counterparts.īy the end of the 18th century, various systems of volume measurement were in use throughout the British Empire. The US customary system has one set of units for fluids and another set for dry goods.
The units of cubic length (the cubic inch, cubic foot, cubic mile, etc.) are the same in the imperial and US customary systems but differ in their specific units of volume (the bushel, gallon, fluid ounce, etc.).
Volume may be measured either in terms of units of cubic length or with specific volume units. The US customary system is based on English systems of the 18th century, while the imperial system was defined in 1824, almost a half-century after American independence. Having this shared heritage, the two systems are quite similar, but there are differences. Please help improve this article by introducing citations to additional sources.įind sources: "Comparison of the imperial and US customary measurement systems" – news Ī 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 litresīoth the British imperial measurement system and United States customary systems of measurement derive from earlier English unit systems used prior to 1824 that were the result of a combination of the local Anglo-Saxon units inherited from Germanic tribes and Roman units. Relevant discussion may be found on the talk page. This article relies largely or entirely on a single source.
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