Units of measurement
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Square kilometer (km²)
Square yard (yd²)
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Information
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 yard (yd²)
A square yard (yd²) is a unit of area measurement equal to 9 square feet or 0.836127 m². It is used in construction and landscaping.