**Full name:** centimetre

**Plural form:** centimetres

**Symbol:** cm

**Alternate spelling:** centimeters

**Category type:** length

**Scale factor:** 0.01

The SI base unit for length is the metre.

1 metre is equal to 100 centimeter.

Valid units must be of the **length** type.

You can use this form to select from known units:

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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centimeter to hair's breadth

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