Units of measurement
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Square kilometer (km²)
Square meter (m²)
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Square kilometer (km²)
A square kilometer (km²) is used for measuring large areas, such as cities, forests, and countries. One km² equals 1,000,000 m².
Square meter (m²)
A square meter (m²) is the primary unit of area measurement in the International System of Units (SI). It is used for measuring room sizes, land plots, etc.