Convert square miles to hectares
Select how many decimal places the result will be rounded to:
How to convert square miles to hectares
To convert square miles to hectares, multiply a square miles value by 258.9988110336.
Formula ha = mi² × 258.9988110336
Example: Convert 0.5 square miles to hectares Calculations: 0.5 mi² × 258.9988110336 ≈ 129.499 ha
Square mile (mi²)
The square mile is an imperial and US customary systems unit of area, defined as the area of a square with sides of 1 mile. It is approximately equal to 2.59 square kilometers.
Hectare (ha)
The hectare is a unit of area in the metric system, defined as the area of a square with sides of 100 meters. It is approximately equal to 2.4711 acres.
Browse related converters
Square miles to Square kilometers Square miles to Square meters Square miles to Square yards Square miles to Square feet Square miles to Square inches Square miles to Acres