Square kilometre (U.S. spelling: square kilometer), symbol km², is a decimal multiple of the SI unit of surface area, the square metre, one of the SI derived units. 1 km² is equal to:

• 1,000,000 m²
• 100 ha (hectare)

Conversely:

• 1 m² = 0.000 001 (10^−6) km²
• 1 hectare = 0.01 (10^−2) km²
• 1 square mile = 2.589 988 km²
• 1 acre = 0.004 047 km², 40.47 ha or 4047 m²

Note: "km²" means (km)², square kilometre or kilometre squared, and not k(m²), 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 (10

m²) is less than a square kilometer which is less than a square megametre (10¹² m²).

Source

• Conversion Factors. MINFILE Coding Manual. Ministry of Energy, Mines and Petroleum Resources. Retrieved on 2007-10-13.

See also

This article is licensed under the GNU Free Documentation License. It uses material from Wikipedia

This article is licensed under the GNU Free Documentation License. It uses material from Wikipedia