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Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).
In 1866, the U.S. Congress passed a law that allowed, but did not require, the use of the metric system in trade and commerce. Included in the law was a table of conversion factors between the customary (i.e. English-derived) and metric units, among them a definition of the meter in terms of the yard, and the kilogram in terms of the pound.
For example, the NIST document has 1 square mile = 2.589 988 E+06 square meters. The convert template has 1 square mile = 2,589,988.110336 square meters. Values for the fundamental physical constants come from the NIST Reference on Constants, Units, and Uncertainty , either the 2010 or the 2014 version.
Table of units of mass Unit Niú Metric US & Imperial Notes Taiwanese Hokkien Hakka Mandarin Character Legal Decimal Exact Approx. Lî: Lî: Lí: 釐: 1 ⁄ 1000 3 / 80,000 kg: 37.5 mg 3750 / 45,359,237 lb: 0.5787 gr: Cash; Same as Japanese Rin: Hun: Fûn: Fēn: 分: 1 ⁄ 100 3 / 8000 kg: 375 mg 37,500 / 45,359,237 ...
The factor–label method can convert only unit quantities for which the units are in a linear relationship intersecting at 0 (ratio scale in Stevens's typology). Most conversions fit this paradigm. An example for which it cannot be used is the conversion between the Celsius scale and the Kelvin scale (or the Fahrenheit scale). Between degrees ...
A gram is defined as one thousandth of the SI base unit, the kilogram, or 1 × 10 −3 kg. Square metre (alternative spelling: square meter; SI unit symbol: m 2) is a superficial area equal to that of a square whose sides' lengths are each one metre. Typically a cheap T-shirt fabric is approximately 150 g/m 2. GSM of fabric helps in determining ...
2) British: A unit of weight equal to a hundredweight (112 lb). 3) A metric unit of weight equal to 100 kilograms. Tonneau: [ French > "barrel"] A weight equal to 1 million grams (or 1 millier), 10 quintals, 100 Myriagrams, or 1,000 Kilograms.
The National Institute of Standards and Technology formerly contended that customary area units are defined in terms of the square survey foot, not the square international foot, [17] but from 2023 it states that "although historically defined using the U.S. survey foot, the statute mile can be defined using either definition of the foot, as is ...