| SI units | |
|---|---|
| 1.000×10−6 m | 1.0000 μm |
| US customary / Imperial units | |
| 3.281×10−6 ft | 39.37×10−6 in |
A micrometre or micron (American spelling:[1] micrometer; symbol µm) is one millionth of a metre, or equivalently one thousandth of a millimetre or one thousand nanometres. It can also be written in scientific notation as 1×10−6 m, meaning 1⁄1000000 m.
A strand of human hair is about 100 µm wide.[2] Red blood cells are approx. 8 µm in diameter.[2]
The micrometre is a common unit of measurement for wavelengths of infrared radiation. The name micron and the solitary symbol µ (both of which were official between 1879 and 1967 [3]) are still used (especially in astronomy and in the semiconductor industry) to denote a micrometre.
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A micrometre (the American spelling is micrometer; symbol is µm) is a unit of length in the SI measurement system. It can also be called a micron. It is one millionth of a metre.
A micrometre is often used as a measurement for cells like bacteria because bacteria are very small also.
A micron is very small.
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