Area Conversions
Popular Comparisons
| m² | ft² | ha | acre | km² | |
|---|---|---|---|---|---|
| Parking space | 15 | 161.5 | 0.0015 | 0.0037 | — |
| Tennis court | 260 | 2,799 | 0.026 | 0.064 | — |
| Football pitch | 7,140 | 76,854 | 0.714 | 1.764 | 0.00714 |
| Central Park NY | 3,410,000 | 36,706,000 | 341 | 842.6 | 3.41 |
| Los Angeles | 1,302,000,000 | 14,014,000,000 | 130,200 | 321,834 | 1,302 |
Area
Area is a derived physical quantity measuring the extent of a two-dimensional surface or region. In the SI system, the base unit is the square metre (m²), with larger practical units including the hectare (ha = 10,000 m²) and square kilometre (km²). Area measurement is fundamental to agriculture, real estate, urban planning, cartography, and physics, where it appears in quantities such as pressure (force per unit area) and flux (flow per unit area).
The imperial and US customary systems introduce units with non-decimal relationships that reflect historical land measurement practices. The acre, still widely used in the United States and United Kingdom, was originally defined as the amount of land a yoke of oxen could plough in a single day — approximately 4,047 m². The square mile, used in land surveys, contains exactly 640 acres, a relationship that structured much of the land division in North America through the Public Land Survey System introduced in 1785.
In geography and environmental science, areas are often expressed in square kilometres or hectares. One hectare is equivalent to 2.471 acres, and this conversion is routinely required in forestry, agriculture, and conservation reporting. At the astronomical scale, the surface areas of planets are expressed in square kilometres, with Earth's total surface area being approximately 510.1 million km² — of which 70.8% is ocean.