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^ Farad in Canadian maps, centimetres are used to make conversions from map scale to real world scale (kilometers) Unicode symbols For the purposes of compatibility with Chinese, Japanese and Korean (CJK) characters, Unicode has symbols for: centimetre (㎝) - code 339D… (More on Centimetre)