Acres to Hectares converter (ac to ha)
Convert Acres (ac) to Hectares (ha) 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.
Hectares to Acres (ha to ac) ►
How to convert Acres to Hectares
1 acre is equal to 0.404686 hectares (ha).
ha = ac × 0.404686
Multiply the acres by 0.404686:
Example: Convert 10 acres to ha:
ha = 10 × 0.404686 = 4.04686 ha
What is a Acres?
The Acres (ac) 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 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.
This page converts area from Acres into Hectares. One ac equals 0.404686 ha.
Acres to Hectares conversion table
Common ac values and the matching ha result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.1 ac | 0.0404686 ha |
| 0.5 ac | 0.202343 ha |
| 1 ac | 0.404686 ha |
| 2 ac | 0.809372 ha |
| 5 ac | 2.02343 ha |
| 10 ac | 4.04686 ha |
| 50 ac | 20.2343 ha |
| 100 ac | 40.4686 ha |
How this calculator works
The form on this page is a Acres-to-Hectares converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the ha 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 ha are in 1 ac?
1 ac = 0.404686 ha.
How do I convert Acres to Hectares?
Multiply the acres by 0.404686:
Is this ac to ha 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.