Square kilometre: Difference between revisions
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'''Square kilometre''' ([[United States of America|U.S.]] spelling: '''square kilometer'''), symbol '''km²''', is a decimal multiple of [[SI]] [[Units of measurement|unit]] of [[surface area]] [[square metre]], one of the [[SI derived unit]]s. | '''Square kilometre''' ([[United States of America|U.S.]] spelling: '''square kilometer'''), symbol '''km²''', is a decimal multiple of [[SI]] [[Units of measurement|unit]] of [[surface area]] [[square metre]], one of the [[SI derived unit]]s. |
Revision as of 14:21, 5 November 2007
Square kilometre (U.S. spelling: square kilometer), symbol km², is a decimal multiple of SI unit of surface area square metre, 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
Note: "km²" means square kilometre and not kilo–square metre. For example, 3 km² is equal to 3 * (1,000 m)² = 3,000,000 m², not 3,000 m².
Comparative order
The 106 m² orders of magnitude page gives comparisons with geographic areas.
A hectare (104 m²) is less than a square kilometre which is less than a square megametre (1012 m²)..