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United States customary units are a system of measurements commonly used in the United States since it was formalized in 1832. The United States customary system developed from English units which were in use in the British Empire before the U.S. became an independent country. The United Kingdom's system of measures was overhauled in 1824 to create the imperial system, which was officially adopted in 1826, changing the definitions of some of its units. Subsequently, while many U.S. units are essentially similar to their imperial counterparts, there are significant differences between the systems.
The stone or stone weight is an English and imperial unit of mass equal to 14 pounds. The stone continues in customary use in the United Kingdom and Ireland for body weight.
English units are the units of measurement used in England up to 1826, 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 history of measurement systems in India begins in early Indus Valley Civilisation with the earliest surviving samples dated to the 5th millennium BCE. Since early times the adoption of standard weights and measures has reflected in the country's architectural, folk, and metallurgical artifacts. A complex system of weights and measures was adopted by the Maurya empire, which also formulated regulations for the usage of this system. Later, the Mughal empire (1526–1857) used standard measures to determine land holdings and collect land tax as a part of Mughal land reforms. The formal metrication in India is dated to 1 October 1958 when the Indian Government adopted the International System of Units (SI).
The hectare is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm2), or 10,000 m2, and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectare and one hectare contains about 2.47 acres.
A number of different units of measurement have been used in Ethiopia. The values of most of these units are not well defined. In 1963, Ethiopia adopted the metric system.
This is a list of Algerian units of measurement that were used before 1843 for things like length, mass and capacity. After that, Algeria adopted the French system of units.
A number of different units of measurement were used in Argentina as its national system was derived from Spanish Castillian. The metric system was legally optional since 1863 and has been compulsory since 1887.
A number of different units of measurement were used in Sri Lanka to measure quantities like length, mass and capacity from very ancient times. Under the British Empire, imperial units became the official units of measurement and remained so until Sri Lanka adopted the metric system in the 1970s.
A number of different units of measurement were used in Chile to measure quantities like length, mass, area, capacity, etc. From 1848, the metric system has been compulsory in Chile.
A number of units of measurement were used in Honduras for length, mass, volume etc. In Honduras, the metric system was adopted in 1910, and has been compulsory since 1912, under a joint convention between Costa Rica, Guatemala, Honduras, Nicaragua and El Salvador.
A number of different units of measurement were used in Cyprus to measure quantities like length, mass, area and capacity. Before the Metric system, the British system was used. In between 1972-1974, metric system was adopted in Cyprus.
A number of units of measurement were used in Slovakia to measure length, capacity, etc. Since 1876, under Czechoslovakia, Metric system has been compulsory.(Local measures and Old Vienna measures were still used during time the state, Czechoslovakia, was established.)
A number of units of measurement were used in Hungary to measure length, area, volume, and so on. The metric system has been adopted in Hungary since 1874 and has been compulsory since 1876.
A number of units of measurement were used in Cambodia to measure length, mass, capacity, etc. Since 1914, the metric system is compulsory in Cambodia.
A number of units of measurement were used in Switzerland to measure length, mass, etc. Metric system was optional in 1868, and has been compulsory since 1877.
A number of units of measurement were used in Syria to measure length, mass, capacity, etc. The metric system was adopted in 1935 in Syria.
A number of different units of measurement were used in Libya to measure length, mass, area, etc. Metric system adopted in Libya in 1927.
A number of different units of measurement were used in Tunisia to measure length, mass, capacity, etc. In Tunisia, Metric System is compulsory since 1895.
A number of units of measurement were used in Venezuela to measure quantities like length, mass, etc. Metric system was optional in Venezuela since 1857, and has been compulsory since 1914.
References
- ↑ Cardarelli, François (2003). Encyclopaedia of Scientific Units, Weights and Measures . London: Springer. pp. 48. ISBN 978-1-4471-1122-1.
- ↑ Gyllenbok, Jan (2018-04-12). Encyclopaedia of Historical Metrology, Weights, and Measures. Birkhäuser. ISBN 9783319667126.
- ↑ Bailey, John; Culley, George (1797). General View of the Agriculture of the County of Northumberland: Drawn Up for the Consideration of the Board of Agriculture and Internal Improvement. S. Hodgson.
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