Hectares to Acres
Convert hectares to acres instantly. 1 ha = 2.4710538147 ac. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert hectares to acres
To convert hectares to acres, multiply by 2.4710538147. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
ac = ha × 2.4710538147
Hectares to Acres conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Hectares | Acres |
|---|---|
| 1 ha | 2.471054 ac |
| 2 ha | 4.942108 ac |
| 3 ha | 7.413161 ac |
| 5 ha | 12.355269 ac |
| 10 ha | 24.710538 ac |
| 20 ha | 49.421076 ac |
| 25 ha | 61.776345 ac |
| 50 ha | 123.552691 ac |
| 100 ha | 247.105381 ac |
| 500 ha | 1,235.53 ac |
| 1,000 ha | 2,471.05 ac |
What is a hectare?
10,000 square metres, or about 2.471 acres. The global standard for farmland.
What is a acre?
43,560 square feet — historically the area one ox team could plough in a day.
The formula
ac = ha × 2.4710538147
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Hectares to Acres
- Type the number of hectares you want to convert.
- Read the result in acres straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked acres to hectares page.
Hectares to Acres — frequently asked questions
How many acres are in a hectare?
One hectare equals 2.4710538147 ac. ac = ha × 2.4710538147
What is the formula to convert hectares to acres?
The formula is ac = ha × 2.4710538147. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert acres back to hectares?
Divide instead of multiplying: one acre is 0.4046856422 ha. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this hectares to acres free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error