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megametre millimetre |

How many m in 1 mm?
The answer is 0.001.

We assume you are converting between **metre** and **millimetre**.

You can view more details on each measurement unit:

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mm

The SI base unit for **length** is the metre.

1 metre is equal to 1 m, or 1000 mm.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between metres and millimetres.

Type in your own numbers in the form to convert the units!

The metre, symbol: m, is the basic unit of distance (or of "length", in the parlance of the physical sciences) in the International System of Units. The internationally-accepted spelling of the unit in English is "metre", although the American English spelling meter is a common variant. However, both American and non-American forms of English agree that the spelling "meter" should be used as a suffix in the names of measuring devices such as chronometers and micrometers.

A millimetre (American spelling: millimeter, symbol mm) is one thousandth of a metre, which is the International System of Units (SI) base unit of length. The millimetre is part of a metric system. A corresponding unit of area is the square millimetre and a corresponding unit of volume is the cubic millimetre.

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