Room for ChanceWhat it measures and where it is used
Area measures a surface, such as a room, a field or a plot of land. Its SI unit is the square metre. Traditional land units such as the acre coexist with the hectare. Square conversion factors must be squared: 1 m² equals 10,000 cm².
- Classification
- SI derived quantity
- SI unit
- m²
- Dimension
- L²
L: length; M: mass; T: time; Θ: temperature; N: amount of substance. The dimension symbol N is not the unit symbol for newton.
How it works
The calculation first converts to a common reference unit, then to the destination unit. Factors in the table show the reference value for one unit.
Example
1 a ≈ 100 m²
Available units
Reference unit: m²
| Available units | Reference factor |
|---|---|
| m² | 1 × x |
| km² | 1,000,000 × x |
| cm² | 0.0001 × x |
| mm² | 0.000001 × x |
| ha | 10,000 × x |
| a | 100 × x |
| ft² | 0.09290304 × x |
| yd² | 0.83612736 × x |
| acre | 4,046.8564224 × x |
| mi² | 2,589,988.11034 × x |
Units, history and conventions
The International System of Units (SI) received its name in 1960. Since the 2019 revision, its definitions use fixed values of seven defining constants. SI base and derived quantities should not be confused with the different units used to express them.