# Centimetre: Map

### Map showing all locations mentioned on Wikipedia article:

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 . Hence a centimetre can be written as (engineering notation) or (scientific E notation) — meaning or respectively,centimetre-gram-second 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 adult person.
1 centimetre

## Equivalence to other units of length

A carpenters' ruler with centimetre divisions
1 centimetre is equal to:
• 0.01 metre, which can be represented by 1.00 E-2 m (1 metre is equal to 100 centimetres)
• about 0.393700787401575 inch (1 inch is equal to 2.54 centimetres)

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

## Uses of centimetre

In addition to its use in the measurement of length, the centimetre is used:
• 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 maps, centimetres are used to make conversions from map scale to real world scale (kilometres)
• to represent second moment of areas (cm^4)

## Unicode symbols

For the purposes of compatibility with Chinese, Japanese and Korean (CJK) characters, Unicode has symbols for:
• centimetre (㎝) - code 339D
• square centimetre (㎠) - code 33A0
• cubic centimetre (㎤) - code 33A4

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

## References

1. BIPM - SI prefixes
2. Inch - from Eric Weisstein's World of Physics
3. Rain Measurement, Rain Gauge, Wireless Rain Gauge, Rain Gage, Rain Gauge Data
4. Capacitance - from Eric Weisstein's World of Physics
5. [1] CJK Compatibility excerpt from The Unicode Standard, Version 4.1.

 Embed code: