Square kilometre
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.
Square Kilometre Media
Part of an Ordnance Survey map, published 1952. The grid lines are at one-kilometre intervals, giving each square an area of one square kilometre. The map shows that the area of the island is about two square kilometres.
Map of Delft, Netherlands, dated 1659. The walls enclosed an area of about 1 square kilometre.
Sources
- ↑ 1.0 1.1 1.2 Common Weights and Measures. The Columbia Electronic Encyclopedia (2017-01-24)Columbia University Press. Retrieved 2023-04-21.
- ↑ 15 Questions About Units of Measurement Answered. Encyclopaedia Britannica (2021-08-26). Retrieved 2023-04-21.