Hectares to Square Miles converter (ha to mi²)
Convert Hectares (ha) to Square Miles (mi²) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
Square Miles to Hectares (mi² to ha) ►
How to convert Hectares to Square Miles
1 hectare (ha) is equal to 0.003861 square miles (mi²).
mi² = ha × 0.003861021585
Multiply the area in hectares by 0.003861021585:
Example: Convert 100 ha to mi²:
mi² = 100 × 0.003861 = 0.3861 mi²
What is a Hectares?
The Hectares (ha) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Square Miles?
The Square Miles (mi²) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts area from Hectares into Square Miles. One ha equals 0.003861022 mi².
Hectares to Square Miles conversion table
Common ha values and the matching mi² result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Hectares (ha) | Square Miles (mi²) |
|---|---|
| 1 ha | 0.003861022 mi² |
| 10 ha | 0.038610216 mi² |
| 50 ha | 0.193051079 mi² |
| 100 ha | 0.386102159 mi² |
| 500 ha | 1.930510793 mi² |
| 1000 ha | 3.861021585 mi² |
How this calculator works
The form on this page is a Hectares-to-Square Miles converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the mi² result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many mi² are in 1 ha?
1 ha = 0.003861022 mi².
How do I convert Hectares to Square Miles?
Multiply the area in hectares by 0.003861021585:
Is this ha to mi² converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.