Formula
ha to mi² conversion formula
Use this relationship for a direct conversion:
mi² = ha x 0.003861021585
Worked example
2 ha = 0.0077220432 mi².
Values derived from exact metric and international length definitions.
Area conversion
Convert Hectare to Square mile
1 hectare (ha) equals 0.003861021585 square mile (mi²). Enter any value below to convert from ha to mi².
Enter a value and choose units. Results update instantly.
1 ha = 0.0038610216 mi²
All Area units
From 1 ha| Unit | Value |
|---|---|
| Square meter m² | 10,000 |
| Square kilometer km² | 0.01 |
| Square centimeter cm² | 100,000,000 |
| Square millimeter mm² | 10,000,000,000 |
| Square inch in² | 15,500,031.000062 |
| Square foot ft² | 107,639.1041670972 |
| Square yard yd² | 11,959.9004630108 |
| Square mile mi² | 0.0038610216 |
| Acre ac | 2.4710538147 |
| Hectare ha | 1 |
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Quick reference
Hectare to Square mile table
| Hectare (ha) | Square mile (mi²) |
|---|---|
| 0.01 | 0.0000386102 |
| 0.1 | 0.0003861022 |
| 1 | 0.0038610216 |
| 2 | 0.0077220432 |
| 5 | 0.0193051079 |
| 10 | 0.0386102159 |
| 25 | 0.0965255396 |
| 50 | 0.1930510793 |
| 100 | 0.3861021585 |
| 1,000 | 3.8610215854 |
From unit
About the hectare
Exactly 10,000 square meters.
Symbol: ha
To unit
About the square mile
The area of a square one mile on each side.
Symbol: mi²
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Related conversions
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
ha to mi² FAQ
How do you convert hectare to square mile?
Use the formula mi² = ha x 0.003861021585. 1 hectare (ha) equals 0.003861021585 square mile (mi²).
Is the ha to mi² conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.