Use the converter below to change any square miles value into hectares instantly — with formula, conversion table, and real-world examples.
Example: 10 mi² × 258.999 = 2,589.99 ha.
The square mile equals 2.589988 square kilometres. It is used for US and UK geographic areas — city, county, state and country sizes. Greater London is 607 mi²; the US state of Texas is 268,597 mi².
The hectare equals 10,000 square metres — a square 100 m on each side. It is the global standard for agricultural land, forests, vineyards and large-scale property. 1 hectare is roughly equivalent to 2.47 acres. European farms are measured in hectares.
Common square miles to hectares values for quick reference.