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

››Want other units?

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

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 10^{3} 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

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