Square Miles to Hectares
Convert square miles (mi²) to hectares (ha). Type in either box; the other updates as you go.
How to convert square miles to hectares
To convert square miles to hectares, multiply the number of square miles by 258.998811.
Example
Convert 5 square miles to hectares:
Square Mile to hectare conversion chart
| Square Miles (mi²) | Hectares (ha) |
|---|---|
| 1 mi² | 258.9988 ha |
| 2 mi² | 517.9976 ha |
| 3 mi² | 776.9964 ha |
| 4 mi² | 1,035.995 ha |
| 5 mi² | 1,294.994 ha |
| 6 mi² | 1,553.993 ha |
| 7 mi² | 1,812.992 ha |
| 8 mi² | 2,071.99 ha |
| 9 mi² | 2,330.989 ha |
| 10 mi² | 2,589.988 ha |
| 12 mi² | 3,107.986 ha |
| 15 mi² | 3,884.982 ha |
| 20 mi² | 5,179.976 ha |
| 25 mi² | 6,474.97 ha |
| 30 mi² | 7,769.964 ha |
| 40 mi² | 10,359.95 ha |
| 50 mi² | 12,949.94 ha |
| 60 mi² | 15,539.93 ha |
| 70 mi² | 18,129.92 ha |
| 75 mi² | 19,424.91 ha |
| 80 mi² | 20,719.9 ha |
| 90 mi² | 23,309.89 ha |
| 100 mi² | 25,899.88 ha |
| 150 mi² | 38,849.82 ha |
| 200 mi² | 51,799.76 ha |
| 250 mi² | 64,749.7 ha |
| 500 mi² | 129,499.4 ha |
| 1,000 mi² | 258,998.8 ha |
Going the other way? See the hectares to square miles chart.
About the units
Square Mile (mi²)
A square mile is 640 acres, about 2.59 square kilometers.
Hectare (ha)
A hectare is 10,000 square meters, a square 100 meters on each side, or about 2.47 acres. It is the standard unit for farmland outside the US.
Frequently asked questions
How many hectares are in a square mile?
There are 258.998811 hectares in a square mile.
How many square miles are in a hectare?
There are 0.003861021585 square miles in a hectare.
How do you convert square miles to hectares?
To convert square miles to hectares, multiply the number of square miles by 258.998811.
What is 5 square miles in hectares?
5 square miles equals 1,294.99 hectares.
Convert between square feet, square meters, acres, hectares and other units of area. Open the area converter to see a value in every unit at once.