Hectares to square miles
Type a value in hectares to see it in square miles straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the hectares box.
- Read the result in square miles as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
mi² = ha × 0.003861021585
Multiply the value in hectares by 0.003861021585 to get square miles.
Example
To convert 25 ha to square miles: 25 × 0.003861021585 = 0.0965255 mi².
Conversion table
| Hectares (ha) | Square miles (mi²) |
|---|---|
| 1 | 0.00386102 |
| 2 | 0.00772204 |
| 3 | 0.0115831 |
| 5 | 0.0193051 |
| 10 | 0.0386102 |
| 20 | 0.0772204 |
| 25 | 0.0965255 |
| 50 | 0.193051 |
| 100 | 0.386102 |
| 250 | 0.965255 |
| 500 | 1.93051 |
| 1,000 | 3.86102 |
About the units
- Hectare
- A hectare is exactly 10,000 square meters, a square 100 m on each side, used for farmland.
- Square mile
- A square mile is 640 acres, exactly 2,589,988.110336 square meters.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many square miles are in one hectare?
1 ha = 0.00386102 mi² exactly.
How do I convert hectares to square miles?
Use mi² = ha × 0.003861021585. For example, 25 ha = 0.0965255 mi².
How many hectares are in one square mile?
1 mi² = 258.999 ha.
How do I convert square meters to square feet?
Divide the square meters by 0.09290304, or multiply by about 10.7639. The factor is exact because a foot is exactly 0.3048 m.
Are the dunam, feddan and acre the same size?
No. A metric dunam is 1000 m², an Iraqi dunam 2500 m², an Egyptian feddan about 4200.83 m² and an acre 4046.8564224 m².