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
The square kilometre (red square) compared to other areas, including a square mile (the entire yellow square).
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 (6th ed.). Columbia University Press. January 24, 2017. Retrieved April 21, 2023.
- ↑ "15 Questions About Units of Measurement Answered". Encyclopaedia Britannica. August 26, 2021. Retrieved April 21, 2023.
There are 100 hectares in 1 square kilometer […]