›› Convert millimetre to centimetre


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to cm

›› More information from the unit converter

How many mm in 1 cm? The answer is 10.
We assume you are converting between millimetre and centimetre.
You can view more details on each measurement unit:
mm or cm
The SI base unit for length is the metre.
1 metre is equal to 1000 mm, or 100 cm.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between millimetres and centimetres.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of mm to cm

1 mm to cm = 0.1 cm

10 mm to cm = 1 cm

20 mm to cm = 2 cm

30 mm to cm = 3 cm

40 mm to cm = 4 cm

50 mm to cm = 5 cm

100 mm to cm = 10 cm

200 mm to cm = 20 cm

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

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›› 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.

›› Definition: Centimeter

A centimetre (American spelling centimeter, symbol cm) is a unit of length that is equal to one hundreth of a metre, the current SI base unit of length. A centimetre is part of a metric system. It is the base unit in the centimetre-gram-second system of units. A corresponding unit of area is the square centimetre. A corresponding unit of volume is the cubic centimetre.

The centimetre is a now a non-standard factor, in that factors of 103 are often preferred. However, it is practical unit of length for many everyday measurements. A centimetre is approximately the width of the fingernail of an adult person.

›› 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!