Convert Hectare (ha) to Square Mile (mi²) instantly.
About these units
Hectare (ha)
A hectare is equal to 10,000 m², or 0.01 km², and is the standard unit of land measurement in agriculture, forestry, and land management across most of the world. Unlike the acre, which comes from historical English land systems, the hectare is fully metric and integrates cleanly into scientific practice. Farmers use hectares to measure fields, crop yields, irrigation requirements, and livestock capacity. Foresters rely on hectares for forest inventories, timber production estimates, and biodiversity assessments. Urban planners use hectares when describing zoning, green space, and population density. The hectare is the perfect intermediate scale: large enough for meaningful land plots, and small enough to avoid unwieldy numbers when describing farms or urban districts.
Square Mile (mi²)
A square mile equals 640 acres or about 2.58999 km². It is the primary unit for describing large areas in the United States and the UK, particularly in geography and land-use planning. City sizes, county boundaries, national park dimensions, and lake surfaces are often expressed in square miles. Because of its large scale, it is ideal for measuring political subdivisions, conservation zones, and territorial claims. The square mile also appears in demographic statistics—such as population density—and in historical surveys of American frontiers, where square-mile sections formed the backbone of land distribution policies.