Convert square kilometers to hectares instantly.
Definition: A square kilometer (symbol: km²) is the area of a square with sides of one kilometer. It equals exactly one million square meters.
History/origin: The square kilometer became a standard large-area metric unit as governments, cartographers, and geographers needed a practical way to measure cities, forests, and regions.
Current use: Square kilometers are used for the area of cities, lakes, countries, parks, and large land or water regions.
Definition: The hectare is a large metric land unit. It equals 10,000 m², so a square plot 100 meters on each side has an area of one hectare.
History/origin: Metric land measurement needed a unit more manageable than square meters for fields and estates, and the hectare filled that role through the are-based metric system.
Current use: Ha is common in agricultural reports, conservation areas, forestry, vineyards, land registries, planning documents, and international comparisons of property or habitat size.
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