# ››Convert metre to millimetre

 m mm

 Did you mean to convert m to megametre millimetre

# ››More information from the unit converter

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:
m or 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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# ››Definition: Meter

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.

# ››Definition: Millimeter

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.

# ››Metric conversions and more

ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!