What is "square kilometre"

alt. standard unit of area, symbol km², equal to the area of a square whose sides are one kilometre long; 10⁶ square metres. n. standard unit of area, symbol km², equal to the area of a square whose sides are one kilometre long; 10⁶ square metres.

Square kilometre ( International spelling as used by the International Bureau of Weights and Measures) or square kilometer (American spelling), symbol km, is a multiple of the square metre, the SI unit of area or surface area.

1 km is equal to:

• 1,000,000 square metres (m)
• 100 hectares (ha)

It is also approximately equal to:

• 0.3861 square miles
• 247.1 acres

Conversely:

• 1 m = 0.000001 (10) km
• 1 hectare = 0.01 (10) km
• 1 square mile =
• 1 acre = about

The symbol "km" means (km), square kilometre or kilometre squared and not k(m), kilo–square metre. For example, 3 km is equal to = 3,000,000 m, not 3,000 m.