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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.

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You can do the reverse unit conversion from mm to m, or enter any two units below:

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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