English units are the historical units of measurement used in England up to 1824, 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. The units were redefined in the United Kingdom in 1824 by a Weights and Measures Act, which retained many but not all of the unit names and redefined some of the definitions. The term "English units" is ambiguous, as it could refer either to the imperial units used in the UK, or to United States customary units, which...

The Imperial units or the Imperial system is a collection of measurement units. An Act of Parliament in 1824 created it from traditional English units. Commonwealth countries used this system from 1824 until they changed to the metric system. The imperial system is very similar to the American system but there are some differences. == Length == The British nautical mile used to be 6080 feet. In 1970 the UK adopted the international definition of 1852 metres. == Measures of area == == Volume == The full table of British apothecaries’ measure is: For a comparison to the U.S. customary system see...