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megametre millimetre |
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cm |

How many mm in 1 cm?
The answer is 10.

We assume you are converting between **millimetre** and **centimetre**.

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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.

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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.

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.

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