Convert Centimeters (cm) to Millimetres (mm) | cm in mm

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# Let's convert Centimeters (cm) to Millimetres (mm)

This quick and easy calculator will convert Centimeters (cm) to Millimetres (mm) and show formula, brief history on the units and quick maths for the conversion.

## Quick Reference for Converting Centimeters to Millimetres

Formula
mm = cm x 10
Quick Rough Maths
To get the Millimetres, multiply the number of Centimeters by 10.0
Centimeters (cm) in 1 Millimetre
There are 0.1 Centimeters in 1 Millimetre
Millimetres (mm) in 1 Centimetre
There are 10 Millimetres in 1 Centimetre

## Unit Information

Centimetre
/ˈsɛntɪmiːtə/
Symbol: cm
Unit System: SI

### What is the Centimetre?

The centimetre is a unit of length and is a multiple of the metre; an SI derived unit. It has the symbol cm.

A centimetre is equal to 0.01m. It is also ≈ 0.3937in.

Centimetres are used in maps to scale up conversions to real world measurements.

Millimetre
/ˈmɪlɪmiːtə/
Symbol: mm
Unit System: SI

### What is the Millimetre?

The millimetre (American spelling millimeter) is a unit of length and is a multiple of the SI unit metre. It uses the symbol mm.

There are 1000 mm in 1 m and 10 mm in 1 cm. From this one can derive that there are 0.03937 in.

The millimetre is sometimes verbally abbreviated to 'mil' - which can cause confusion in the US as there is a unit there that means thousandth of an inch.