Most length units are shared among the Imperial and U.S. customary units (also called standard units there) or older British/English units/systems and newer additions (foot-pound-second systems) is often not drawn precisely. The distinction between this imperial system and the U.S. The units were introduced in the United Kingdom and its colonies, including Commonwealth countries, but excluding the then already independent United States. The Imperial units or the Imperial system is a collection of English units, first defined in the Weights and Measures Act of 1824, later refined (until 1959) and reduced. This article is about post-1824 Imperial units. The conversions on this site require the use of JavaScript so please enable before continuing.įor assistance in enabling JavaScript, please contact the webmaster.
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