Centimetre

Millimetre Length Metric system
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centimetre
CarpentersRule.png
A carpenter's ruler with centimetre divisions
General information
Unit systemmetric
Unit oflength
Symbolcm 
Conversions
1 cm in ...... is equal to ...
   SI units   10 mm
   imperial & US system   ~0.3937 in

A centimetre (international spelling) or centimeter (American spelling) (SI symbol cm) is a unit of length in the metric system, equal to one hundredth of a metre, centi being the SI prefix for a factor of 1/100.[1] The centimetre was the base unit of length in the now deprecated centimetre–gram–second (CGS) system of units.

Though for many physical quantities, SI prefixes for factors of 103—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 average adult person.

Equivalence to other units of length

1 centimetre = 10 millimetres
= 0.01 metres
= 0.39370078740157480314960629921259842519685 inches
 (There are exactly 2.54 centimetres in one inch.)

One millilitre is defined as one cubic centimetre, under the SI system of units.

Other uses

In addition to its use in the measurement of length, the centimetre is used:

Unicode symbols

For the purposes of compatibility with Chinese, Japanese and Korean (CJK) characters, Unicode has symbols for:[4]

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

See also

References

  1. ^ "Decimal multiples and submultiples of SI units". Bureau International des Poids et Mesures. 2014. Retrieved 5 July 2015.
  2. ^ Rain Measurement, Rain Gauge, Wireless Rain Gauge, Rain Gage, Rain Gauge Data
  3. ^ Capacitance - from Eric Weisstein's World of Physics
  4. ^ CJK Compatibility excerpt from The Unicode Standard, Version 10.0.