Square kilometre
decimal multiple of the SI unit of surface area
A square kilometer (British English spelling square kilometre, in short km²) is a unit of measurement of area.It is based on the SI unit meter.
Equal areas
A square that has a side length of 1 kilometer (1000 meters) has an area of one square kilometer.
- 1,000 m × 1,000 m = 1 km × 1 km = 1,000,000 m² = 1 km²[1]
There are 100 hectares in one square kilometer.[2][1]One square kilometer is just less than 0.39 square miles.[1]
Use
Square kilometer is often used to say how much surface something occupies on Earth.It can, for example, be used to describe the area of a city or country.These usually take more than 1 km² on Earth.
The number of people living in a square kilometer is known as population density.
Sources
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