Square miles to Hectares – square mile to hectare Converter
1 mi² = 258.9988110336 ha
Formula
ha = mi² × 258.9988110336
Square miles to hectares conversion table
| square miles (mi²) | hectares (ha) |
|---|---|
| 0.25 mi² | 64.7497 ha |
| 0.5 mi² | 129.499 ha |
| 1 mi² | 258.9988110336 ha |
| 2 mi² | 517.998 ha |
| 5 mi² | 1294.99 ha |
| 10 mi² | 2589.99 ha |
| 20 mi² | 5179.98 ha |
| 50 mi² | 12949.9 ha |
| 100 mi² | 25899.9 ha |
| 200 mi² | 51799.8 ha |
| 500 mi² | 129499 ha |
| 1000 mi² | 258999 ha |
| 2500 mi² | 647497 ha |
| 5000 mi² | 1294990 ha |
| 10000 mi² | 2589990 ha |
Square miles and hectares are both area units. One square mile equals 258.9988110336 hectares; enter any value above for an instant result, or use the table for common conversions.
Sanity-check examples
1 mi² = 258.999 ha10 mi² = 2589.99 ha2.5 mi² = 647.497 ha
Common pitfalls and look-alike units
The mu is a Chinese market unit: 1 mu = 666.667 m² (about 666.67), not to be confused with the acre (≈ 4046.86 m²) or the hectare (10000 m² = 15 mu). Confirm which unit a land figure uses before converting.
Frequently asked questions
How many hectares are in a square mile?
1 square mile (mi²) equals 258.9988110336 hectare (ha).
How do I convert square miles to hectares?
Multiply the square mile value by 258.9988110336 to get hectare — for example, 2 square miles = 517.998 hectare.
How do I convert hectares back to square miles?
1 hectare is approximately 0.00386102 square mile. Use the swap button or the reverse conversion page linked on this page.