Millimetre

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.

It is equal to 1,000 micrometres and 1,000,000 nanometres. There are 25.4 mm in one inch.

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

• 1 E-3 m
• SI
• SI prefix
• Metric system
• Orders of magnitude (length)
• Conversion of units, for comparison with other units of length

References

• CJK Compatibility excerpt from The Unicode Standard, Version 4.1.

v • d • e SI units of length yoctometre <<< zeptometre <<< attometre <<< femtometre <<< picometre <<< nanometre <<< micrometre <<< millimetre < centimetre < decimetre < metre < decametre < hectometre < kilometre <<< megametre <<< gigametre <<< terametre <<< petametre <<< exametre <<< zettametre <<< yottametre