Square Miles to Hectares
1 Square Mile = 258.9988 Hectares
Common amounts:
About the square mile to hectare conversion
The square mile (mi²) and the hectare (ha) are both units of area. Convert between area units — square meters, square kilometers, hectares, acres, square feet, square yards and square miles.
To convert square miles to hectares, multiply by 258.9988. To go back, multiply hectares by 0.003861.
Reference table
| Square Miles | Hectares |
|---|---|
| 1 mi² | 258.9988 ha |
| 5 mi² | 1,294.99 ha |
| 10 mi² | 2,589.99 ha |
| 25 mi² | 6,474.97 ha |
| 50 mi² | 12,949.94 ha |
| 100 mi² | 25,899.88 ha |
Need the reverse conversion? Convert Hectares to Square Miles.
Convert Square Mile to other area units
Frequently asked questions
- How many hectares is 1 square mile?
- 1 Square Mile equals 258.9988 Hectares. To go the other way, 1 Hectare equals 0.003861 Square Miles.
- What's the formula to convert square miles to hectares?
- Multiply the number of square miles by 258.9988 to get hectares. For example, 10 square miles × 258.9988 = 2,589.99 hectares.
- Does this converter handle decimals and very large numbers?
- Yes. Type any real number, including decimals or values in the trillions. Math runs entirely in your browser — no server round-trip, no sign-up, and nothing to install.