| 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:
- 1 m² = 0.000 001 km2
- 1 hectare = 0.01 km2
- 1 square mile = 2.589 988 km2
- 1 acre = 0.004 047 km2
The 1 E6 m² orders of magnitude page gives comparisons with geographic areas.
hectare « square kilometre « square megametre
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