square kilometre
Sign in to savedecimal multiple of the SI unit of surface area
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A square kilometre is a metric unit of area equal to a surface measuring one kilometre on each side, making it part of the standard international system of measurements used worldwide. It's commonly used to describe the size of geographic areas like cities, regions, and countries, providing a consistent way for people across different nations to understand and compare land sizes.
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The square kilometre (square kilometer in American spelling; symbol: km) is a multiple of the square metre, the SI unit of area or surface area. In the SI unit of area (m), 1 km is equal to 1M(m).
1 km is equal to: