Square Miles to Hectares Converter
Convert square miles (mi²) to hectares (ha)
Result
258.998811 ha
Hectares
1 mi² = 258.998811 ha
1 mi² in other units
- 1Enter a valueType the number to convert
- 2Pick the unitsChoose what to convert from and to
- 3Read the resultSee it in every other unit too
How to convert square miles to hectares
One square mile equals 258.9988 hectares, so multiply the number of square miles by 258.9988.
ha = mi² × 258.9988
1 mi² = 258.9988 ha · 1 ha = 0.003861022 mi²
Worked example
To convert 5 square miles to hectares: 5 mi² × 258.9988 = 1,294.994 ha.
About square miles (mi²)
A square mile is 640 acres, about 2.59 km².
About hectares (ha)
A hectare is 10,000 m² (a 100 m × 100 m square), about 2.47 acres. Farmland is often measured in hectares.
More conversions
Square Miles to other units
Frequently asked questions
How many hectares are in one square mile?
One square mile equals 258.9988 hectares.
How many square miles are in one hectare?
One hectare equals 0.003861022 square miles.
How do I convert square miles to hectares?
Use the formula ha = mi² × 258.9988. For example, 5 mi² × 258.9988 = 1,294.994 ha.