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A centimetre (American spelling: centimeter, symbol cm) is a unit of length in the metric system, equal to one hundredth of a metre, which is the current SI base unit of length. Centi is the SI prefix for a factor of 10$^\{-2\}$. Hence a centimetre can be written as 10×10$^\{-3\}$ m (engineering notation) or (scientific E notation) — meaning or respectively. The centimetre is the base unit of length in the now deprecated centimetre-gram-second system of units.

Though for many physical quantities, SI prefixes for factors of 10^{3} - like milli and kilo - are often preferred by technicians, the centimetre remains a practical unit of length for many everyday measurements. A centimetre is approximately the width of the fingernail of an adult person.

The centimeter is the distance light travels through a vacuum in $frac\{1\}\{29\; 979\; 245\; 800\}$ second.

- 0.01 metres, which can be represented by 1.00 E-2 m (1 metre is equal to 100 centimetres)
- about 0.393700787401575 inches (1 inch is equal to 2.54 centimetres exactly)

1 cubic centimetre is equal to 1 millilitre, under the current SI system of units.

- sometimes, to report the level of rainfall as measured by a rain gauge
- in the CGS system, the centimetre is used to measure capacitance, where 1 cm of capacitance = 1.113×10$^\{-12\}$ Farad
- in Canadian maps, centimetres are used to make conversions from map scale to real world scale (kilometres)

- centimetre (㎝) - code 339D
- square centimetre (㎠) - code 33A0
- cubic centimetre (㎤) - code 33A4

They are useful only with East Asian fixed-width CJK fonts, because they are equal in size to one Chinese character.

- 1 E-2 m
- SI
- SI prefix
- Metric system
- Orders of magnitude (length)
- Conversion of units, for comparison with other units of length

- CJK Compatibility excerpt from The Unicode Standard, Version 4.4 and co-exterior users.

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Last updated on Saturday October 11, 2008 at 18:06:09 PDT (GMT -0700)

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This article is licensed under the GNU Free Documentation License.

Last updated on Saturday October 11, 2008 at 18:06:09 PDT (GMT -0700)

View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation

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