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Square kilometre

Square kilometre (symbol km²) is an SI unit of surface area. It is one of the SI derived units.

1 km² is equal to:

• the area of a square measuring 1 kilometre on each side
• 1 000 000 m²
• 100 hectares
• 0.386 102 square miles (statute)
• 247.105 381 acres

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

See also

• Conversion of units.

External links

• Conversion of English and American area units to metric units (http://www.sengpielaudio.com/ConvArea.htm)
• Conversion calculator for units of area (Cleave Books) (http://www.ex.ac.uk/trol/scol/index.htm)

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