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Square kilometre (U.S. spelling: square kilometer), symbol km², is an SI unit of surface area. It is one of the SI derived units. 1 km² is equal to: Conversely: Note: "km²" means square kilometre and not kilo–square metre. For example, 3 km² is equal to 3 000 000 m², not 3000 m².
Comparative order The 1 E6 m² orders of magnitude page gives comparisons with geographic areas. hectare (104 m²) < square kilometre < square megametre (1012 m²) See also | ||||||||
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