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Metric prefixes have also been used with some non-metric units. The SI prefixes are metric prefixes that were standardised for use in the International System of Units (SI) by the International Bureau of Weights and Measures (BIPM) in resolutions dating from 1960 to 2022. [1] [2] Since 2009, they have formed part of the ISO/IEC 80000 standard.
Prefix name N/A deca hecto kilo mega giga tera peta exa zetta yotta ronna quetta; Prefix symbol da h k M G T P E Z Y R Q Factor 10 0: 10 1: 10 2: 10 3: 10 6: 10 9: 10 12: 10 15: 10 18: 10 21: 10 24: 10 27: 10 30
Some popular US dictionaries list only the spelling angstrom. [2] [3] The unit's symbol is Å, which is a letter of the Swedish alphabet, regardless of how the unit is spelled. [1] [4] [3] However, "A" [citation needed] or "A.U." [11] [7] may be used in less formal contexts or typographically limited media.
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).
The template common metric prefixes creates an infobox that lists the most commonly used metric prefixes. The list is a subset of the list in the 8th edition of the official brochure of the BIPM (SI units and prefixes).
A table of SI prefixes for a given symbol. Template parameters [Edit template data] Parameter Description Type Status right right no description Unknown optional Anchor anchor An anchor for linking; for example, set to Prefix_table for [[Page name#Prefix_table]] to link to the table. No whitespace. Example Prefix_table String optional Unit unit The name of the unit Example metre String ...
The first group of metric units are those that are at present defined as units within the International System of Units (SI). In its most restrictive interpretation, this is what may be meant when the term metric unit is used. The unit one (1) is the unit of a quantity of dimension one. It is the neutral element of any system of units. [2]
The following table lists the names of small numbers ... and International System of Units (SI) symbols and prefixes. [1] ... SI prefix SI symbol 10 0: 1: One: 10 − ...