›› Convert centimetre to millimetre


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›› More information from the unit converter

How many cm in 1 mm? The answer is 0.1.
We assume you are converting between centimetre and millimetre.
You can view more details on each measurement unit:
cm or mm
The SI base unit for length is the metre.
1 metre is equal to 100 cm, or 1000 mm.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between centimetres and millimetres.
Type in your own numbers in the form to convert the units!

›› Quick conversion chart of cm to mm

1 cm to mm = 10 mm

5 cm to mm = 50 mm

10 cm to mm = 100 mm

15 cm to mm = 150 mm

20 cm to mm = 200 mm

25 cm to mm = 250 mm

30 cm to mm = 300 mm

40 cm to mm = 400 mm

50 cm to mm = 500 mm

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

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›› 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.

›› 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!