Formula
mi² to ha conversion formula
Use this relationship for a direct conversion:
ha = mi² x 258.9988110336
Worked example
2 mi² = 517.9976220672 ha.
Values derived from exact metric and international length definitions.
Area conversion
Convert Square mile to Hectare
1 square mile (mi²) equals 258.9988110336 hectare (ha). Enter any value below to convert from mi² to ha.
Enter a value and choose units. Results update instantly.
1 mi² = 258.9988110336 ha
All Area units
From 1 mi²| Unit | Value |
|---|---|
| Square meter m² | 2,589,988.1103360001 |
| Square kilometer km² | 2.5899881103 |
| Square centimeter cm² | 25,899,881,103.3600006104 |
| Square millimeter mm² | 2.5899881103e12 |
| Square inch in² | 4,014,489,600.0000004768 |
| Square foot ft² | 27,878,400 |
| Square yard yd² | 3,097,600 |
| Square mile mi² | 1 |
| Acre ac | 640 |
| Hectare ha | 258.9988110336 |
Recent conversions
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Quick reference
Square mile to Hectare table
| Square mile (mi²) | Hectare (ha) |
|---|---|
| 0.01 | 2.5899881103 |
| 0.1 | 25.8998811034 |
| 1 | 258.9988110336 |
| 2 | 517.9976220672 |
| 5 | 1,294.994055168 |
| 10 | 2,589.988110336 |
| 25 | 6,474.97027584 |
| 50 | 12,949.94055168 |
| 100 | 25,899.88110336 |
| 1,000 | 258,998.8110336 |
From unit
About the square mile
The area of a square one mile on each side.
Symbol: mi²
To unit
About the hectare
Exactly 10,000 square meters.
Symbol: ha
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Source
Conversion standard
Definitions are checked against NIST SP 811: Area units. Calculations use full internal precision before display rounding.
View the complete area converterQuestions
mi² to ha FAQ
How do you convert square mile to hectare?
Use the formula ha = mi² x 258.9988110336. 1 square mile (mi²) equals 258.9988110336 hectare (ha).
Is the mi² to ha conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.