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Imperial units. This article is about the post-1824 measures used in the British Empire and countries in the British sphere of influence. For the units used in England before 1824, see English units. For the system of weight, see Avoirdupois. For United States customary units, see United States customary units.
The imperial system of measurement or the British imperial system is the system of measurement defined in the UK after the Weights and Measures Act of 1824 and 1878. These include units that were in common use in Britain like inches, pounds, gallons, etc.
• describe the relationships of the units of length, area, volume, capacity, mass and temperature in the imperial system. • compare the American and British imperial units. • convert between imperial and SI units.
English units forms the basic for the Imperial system formerly used in the Commonwealth countries and the Customary system used in the US. The basic difference between dimensional systems are not the units employed but the primary dimensions.
English units were the units of measurement used in England up to 1826 (when they were replaced by Imperial units), which evolved as a combination of the Anglo-Saxon and Roman systems of units. Various standards have applied to English units at different times, in different places, and for different applications.
For both liquid and dry measure, the British system uses one standard quart, which is equal to two imperial pints, or one-fourth imperial gallon (69.36 cubic inches, or 1,136.52 cubic cm). The U.S. system has two units…
Temperature is a special case in which temperature scales are very different, so, you need to do multiple operations to convert from metric (Celsius) to Imperial (Fahrenheit) and vice versa. If you know °F, use the equation in the third column to convert to °C.
