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From Wikipedia, the free encyclopedia

1 millimetre =
SI units
1×10−3 m 0.1 cm
US customary / Imperial units
3.2808×10^−3 ft 39.370×10^−3 in

The millimetre (American spelling: millimeter, symbol mm) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length.

Equal to 1000 micrometres. Equal to 1000000 nanometres.

Unicode symbols

For the purposes of compatibility with Chinese, Japanese and Korean (CJK) characters, Unicode has symbols for:

  • millimetre (㎜) - code 339C
  • square millimetre (㎟) - code 339F
  • cubic millimetre (㎣) - code 33A3

They are useful only with East Asian fixed-width CJK fonts, because they are equal in size to one Chinese character.

See also



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