Micrometer

A micrometre or micron (American spelling: micrometer; symbol µm) is one millionth of a metre,or equivalently one thousandth of a millimetre. It can be written in scientific notation as 1×10 m, meaning ⁄1000000 m. Or equivalent to one thousand nanometres (1000 nm). A strand of human hair is about 100 µm wide. Red blood cells are approx. 8 µm in diameter. The micrometre is a common unit of measurement for wavelengths of infrared radiation. The n... more

Also known as:

  • Micron,
  • Micrometre,
  • Micrometers,
  • Micrometres
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Unit Profile

Canonical Abbreviation:

  • µm

Dimension:

Abbreviation(s):

  • µm
  • µ
  • um
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