Square miles (mi²) to Hectares (ha) Conversion
Square miles
The square mile is a unit of area equal to exactly 2,589,988.110336 square metres (approximately 2.59 km²). It is the standard unit for measuring large land areas, population density, and political jurisdictions in the United States and United Kingdom. One square mile contains exactly 640 acres — the basis of the US Public Land Survey System that structured much of North American land division.
Hectares
The hectare is a unit of area equal to exactly 10,000 square metres (100 m × 100 m), the standard unit for measuring agricultural land, forest area, and nature reserves internationally. The word derives from the Greek hekaton (hundred) and the French are (100 m²). One hectare is approximately 2.471 acres, and global food production statistics and deforestation rates are almost universally expressed in hectares.
| Square miles (mi²) | Hectares (ha) |
|---|---|
| 0.1 mi² | 25.8999 ha |
| 1 mi² | 258.9988 ha |
| 2 mi² | 517.9976 ha |
| 3 mi² | 776.9964 ha |
| 5 mi² | 1,294.9941 ha |
| 10 mi² | 2,589.9881 ha |
| 20 mi² | 5,179.9762 ha |
| 30 mi² | 7,769.9643 ha |
| 50 mi² | 12,949.9406 ha |
| 100 mi² | 25,899.8811 ha |
| 1000 mi² | 258,998.811 ha |
Frequently Asked Questions (FAQ)
How many hectares are in 1 square miles?
1 square miles (mi²) is exactly 258.999 hectares (ha).
How do I convert square miles to hectares?
Multiply the value in square miles by 258.999 to get the result in hectares. Or use the converter above — type any number and see the result instantly.