In England (and the British Empire), English units were replaced by Imperial units in 1824 (effective as of 1 January 1826) by a Weights and Measures Act, which retained many though not all of the unit names and redefined (standardised) many of the definitions. The two main sets of English units were the Winchester Units, used from 1495 to 1587, as affirmed by King Henry VII, and the Exchequer Standards, in use from 1588 to 1825, as defined by Queen Elizabeth I. Use of the term "English units" can be ambiguous, as, in addition to the meaning used in this article, it is sometimes used to refer to the units of the descendent Imperial system as well to those of the descendant system of United States customary units. Various standards have applied to English units at different times, in different places, and for different applications.
For an overview of both UK and US non-metric units, see Imperial and US customary measurement systems.Įnglish units are 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. For the system currently used in the US with similar unit names, see United States customary units. For the non-metric measurement system used in the UK, see Imperial units. This article is about the historical development of measurement in England up to 1826.
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