Square centimetre (cm²)
The square centimetre (symbol: cm²) is a metric unit of area equal to one ten-thousandth of a square metre (10⁻⁴ m²). It corresponds to the area of a square with sides measuring exactly one centimetre. Historically part of the CGS (centimetre-gram-second) system of units, it remains a standard measurement in scientific contexts, engineering, paper dimensions, and daily life for small surfaces like human skin area or electronics.
Metric
- Square kilometre (km²)1×10⁻¹⁰
- Hectare (ha)1×10⁻⁸
- Are (a)1×10⁻⁶
- Square metre (m²)1×10⁻⁴
- Square decimetre (dm²)0.01
- Square centimetre (cm²)1
- Square millimetre (mm²)100
- Square micrometre (µm²)100,000,000
- Square nanometre (nm²)1×10¹⁴
British/American
- Township1.07×10⁻¹²
- Square mile3.86×10⁻¹¹
- Homestead1.54×10⁻¹⁰
- Acre2.47×10⁻⁸
- Rood9.88×10⁻⁸
- Square rod3.95×10⁻⁶
- Square1.08×10⁻⁵
- Square yard (yr²)1.2×10⁻⁴
- Square foot (ft²)1.08×10⁻³
- Square inch (in²)0.16
Other
- Metric dunam1×10⁻⁷
- Cypriot dunam7.47×10⁻⁸
- Iraqi dunam4×10⁻⁸
- Football pitch1.4×10⁻⁸
Brazilian
- Alqueire paulista4.13×10⁻⁹
- Alqueire mineiro2.07×10⁻⁹
- Alqueire baiano1.03×10⁻⁹
- Alqueire do norte3.68×10⁻⁹