To help compare sizes of different geographic regions, we list here areas between 1 km² (100 hectares) and 10 km² (1000 hectares). See also areas of other orders of magnitude.

• Areas smaller than 1 km²
• 1 Square kilometre (U.S. spelling: square kilometer), symbol km², is an SI unit of surface area. It is one of the SI derived units. It is equal to:
  • 100 hectares
  • 10⁶ m² or 1,000,000 m²
  • 0.386 square miles
  • 247 acres
  • the area of a square of side length 1 km
  • a cube with this surface area has sides of length 408 m
  • a circle of this area has a radius of 564 m
  • a sphere of this surface area has a radius of 282 m
• 135 hectares—the campus of the United States Naval Academy
• 195 hectares—Monaco (country ranked 192^nd by area)
• 200 hectares—Herm, Channel Islands
• 290 hectares—City of London
• 320 hectares—Hampstead Heath in London
• 650 hectares—Gibraltar
• 890 hectares—size of largest organism on Earth, Armillaria ostoyae. Reference
• Areas larger than 10 km²

Notes

"km²" means square kilometre and not kilo–square metre. For example, 3 km² is equal to 3 000 000 m² and not to 3000 m² (nor even 9 000 000 m²). Thus, in the case of an area, the SI prefixes provide steps of a factor one million instead of one thousand .

See also: Orders of magnitude

References

External links

• Conversion Calculator for Units of AREA

Orders of magnitude (area)

1 E6 m² | 1 E6 m² | Kuadrado kilometro | 1 E6 m² | Square kilometre | 1 E6 m²