Free instant mi² → ha converter. No signup, no uploads — everything is calculated privately in your browser.
1 mi² = 258.999 hectares
1 square miles = 258.999 hectares
Free, instant, and 100% private — every calculation runs in your browser. Nothing is uploaded.
1 square mile equals 258.999 hectares. To convert square miles to hectares, multiply the value by 258.9988110336.
1 square mile = 258.999 hectares. Formula: value × 258.9988110336
Example: 1 mi² → 258.999 ha. Type any value in the converter above to see it converted live.
| Square Miles (mi²) | Hectares (ha) |
|---|---|
| 1 mi² | 258.999 ha |
| 2 mi² | 517.998 ha |
| 5 mi² | 1,294.99 ha |
| 10 mi² | 2,589.99 ha |
| 25 mi² | 6,474.97 ha |
| 50 mi² | 12,949.9 ha |
| 100 mi² | 25,899.9 ha |
| 250 mi² | 64,749.7 ha |
| 500 mi² | 129,499 ha |
| 1,000 mi² | 258,999 ha |
1 square mile = 258.999 hectares. Formula: value × 258.9988110336. Enter the value above and the result appears instantly — the calculation runs entirely in your browser.
Exactly: 1 square mile = 258.9988110336 hectares. The reverse factor is 1 hectare = 0.003861021585424458 square miles.
1 mi² = 258.999 ha; 10 mi² = 2,589.99 ha; 100 mi² = 25,899.9 ha. Use the full conversion table below for more reference values.
A hectare is metric and equals exactly 10,000 m² (100 m × 100 m). An acre is 4,046.8564224 m², or 43,560 sq ft. That makes 1 hectare = 2.47105 acres. Land in the US is usually listed in acres; most other countries use hectares.