Convert Square Miles to Hectares
One square mile equals 258.998811 hectares. Type any value to convert square miles to hectares instantly — with a full reference table below.
Convert Square Miles to Hectares
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Conversion formula
To convert square miles to hectares, multiply by 258.998811. One square mile equals 258.998811 ha, and one hectare equals 0.003861 mi².
Square Miles to Hectares table
About converting Square Miles to Hectares
Square Miles (mi²) and Hectares (ha) are both units of area. The exact factor is 1 mi² = 258.998811 ha, so multiply by 258.998811 to go from square miles to hectares (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Hectares to Square Miles converter, or the full unit converter for every unit at once.
Frequently asked questions
How many hectares are in one square mile?
One square mile equals 258.998811 hectares.
How do I convert square miles to hectares?
Multiply the number of square miles by 258.998811. For example, 10 square miles = 2,589.98811 hectares.
What is 5 square miles in hectares?
5 square miles is 1,294.994055 hectares.