![]() 160 square rods or 36,000 square Anglo-Saxon feet. The rod was 15 Anglo-Saxon feet, the furlong 10 rods. The foot was divided into 4 palms or 12 thumbs. During the Anglo-Saxon period, the North German foot of 13.2 inches (335 millimetres) was the nominal basis for other units of linear measurement. During the Roman period, Roman Britain relied on Ancient Roman units of measurement. Very little is known of the measurement units of the British Isles prior to Roman colonisation in the 1st century AD. ![]() In the US, being independent from the British Empire decades before the 1824 reforms, English units were standardized and adopted (as "US Customary Units") in 1832. In England (and the British Empire), English units were replaced by Imperial units in 1824 (effective 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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