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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 current SI base unit of length.

The corresponding unit of area is the square millimetre and the corresponding unit of volume is the cubic millimetre.

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


ar:مليمتر bg:Милиметър de:Meter#Dezimale_Vielfache_und_Teile_des_Meters et:Millimeeter el:Χιλιοστόμετρο eo:Milimetro eu:Milimetro ia:Millimetro is:Millimetri it:Millimetro sw:Millimita lv:Milimetrs hu:Milliméter mk:Милиметар nl:Millimeter no:Millimeter nn:Millimeter sk:Milimeter sl:Milimeter sr:Milimetar ta:மில்லிமீட்டர் th:มิลลิเมตร uk:Міліметр vec:Miłimetro