The square kilometre (square kilometer in American spelling; symbol: km 2) is a multiple of the square metre, the SI unit of area or surface area. In the SI unit of area (m 2 ), 1 km 2 is equal to 1M(m 2 ).

Square kilometre (U.S. spelling: square kilometer), symbol km², is a decimal multiple of SI unit of surface area square metre, one of the SI derived units. It is not used as regular unit of measurement in the US. Type the number of Square kilometre (km²) you want to convert in the text box, to see the results in the table.

平方公里 （符號為 km²，英語： square kilometre）是 面積 的 公制 單位（SI Unit），其定義是「邊長為1 公里 的 正方形 的 面積」。

平方千米（Square kilometer）是面积的公制单位（SI Unit）。其定义是“边长为1千米的正方形的面积”，也是计量土地的单位，简写为km²。

Free online area converter - converts between 40 units of area, including square meter [m^2], square kilometer [km^2], square centimeter [cm^2], square millimeter [mm^2], etc. Also, explore many other unit converters or learn more about area unit conversions.

A square kilometer is a unit of area in the Metric System. The symbol for square kilometer is km2. A square kilometer is calculated as the area of a square that has 1 kilometer on each side. The International spelling is square kilometre.

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.

平方公里即平方千米（Square kilometer）是公制面积单位。 其定义是：边长为1千米的正方形的面积，也是测量土地的单位，简写为km²。 平方千米与其它面积单位换算表

2024年7月26日 · A square kilometer is a metric unit used to measure area, specifically equivalent to the area covered by a square where each side measures exactly one kilometer in length. This unit, represented as km², is widely used for expressing land measurements in geography, mapping, and urban planning, covering territories such as forests, water bodies ...

Convert square kilometers (sq km) to another unit of area such as square miles, acres, or square yards, and see the conversion formulas.