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The US customary system is based on English systems of the 18th century, while the imperial system was defined in 1824, almost a half-century after American independence . Volume may be measured either in terms of units of cubic length or with specific volume units.
US customary units, however, are still the main system of measurement in the United States. While some steps towards metrication have been made (mainly in the late 1960s and early 1970s), the customary units have a strong hold due to the vast industrial infrastructure and commercial development.
Related pages. Comparison of the Imperial and US customary systems. The imperial and U.S. customary systems are similar, but there are some differences between them. Volume. The main difference is in units of volume. The American system has two gallons: a wet and a dry one. The imperial gallon is bigger than each of these.
U.S. customary units have been defined in terms of metric units since the 19th century, and the SI has been the "preferred system of weights and measures for United States trade and commerce" since 1975 according to United States law.
British Imperial and U.S. Customary systems of weights and measures. unit. abbreviation or symbol. equivalents in other units of same system. metric equivalent. Weight. Avoirdupois*. avdp. * The U.S. uses avoirdupois units as the common system of measuring weight.
U.S. customary units is the main system of units of measurement used to measure things in the United States and U.S. territories (except in Puerto Rico and Guam, where the metric system is also officially used and is dominant). The system of Imperial units, on which the U.S. customary units are based, is very similar but there are some differences.
About. Transcript. This video dives into the world of measurement units, distinguishing between U.S. customary units and metric units. It explores how these units measure different aspects such as length, weight, mass, and volume. Created by Sal Khan and Monterey Institute for Technology and Education. Questions. Tips & Thanks.
