micrometre
Also known as µm, micron, um, micrometres
The micrometre (or micrometer in US spelling; symbol: μm) is a unit of length in the International System of Units (SI) equalling (SI standard prefix "micro-" = ); that is, one millionth of a metre (or one thousandth of a millimetre, , or about ). Also known as a micron.
AI overview
A micrometre is a unit of measurement equal to one millionth of a metre (or about one twenty-five-thousandth of an inch), commonly used in science and industry to measure very small objects and distances. It matters because many important things—like bacteria, viruses, and the components of computer chips—exist at scales where micrometres are the natural way to describe their sizes.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
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- A 6 μm diameter carbon filament above a 50 μm diameter human hair
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- micrometre
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- μm
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- SI
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- length
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- imperial/US units
via Wikipedia infobox
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Article
6 sectionsContents
- Examples
- SI standardization
- Symbol
- See also
- Notes and references
- External links
The micrometre (or micrometer in US spelling; symbol: μm) is a unit of length in the International System of Units (SI) equalling (SI standard prefix "micro-" = ); that is, one millionth of a metre (or one thousandth of a millimetre, , or about ). Also known as a micron.
The nearest smaller common SI unit is the nanometre, equivalent to one thousandth of a micrometre, one millionth of a millimetre or one billionth of a metre ( or ).