This converter turns hectares into acres instantly, using the exact factor 1 hectare = 2.471053815 acres. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Ten thousand square metres, the international unit of land area. Originally the area one ox team could plough in a day; now exactly 4,046.86 m².
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
hectares- The amount you are converting, measured in hectares
2.471053815- The exact number of acres in one hectare
acres- The converted result
How it works, step by step
- Enter the number of hectares you want to convert.
- The value is multiplied by 2.471053815, the exact conversion factor.
- The result is displayed in acres, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 hectares
Multiply 5 by 2.4710538. That gives 12.3553 acres. A quick sanity check: one hectare is larger than one acre, so the number should get bigger — and it does.
Converting 72 hectares
72 × 2.4710538 = 177.9159 acres. Working backwards, 177.9159 ÷ 2.4710538 returns 72 hectares, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many acres are in one hectare?
Exactly 2.471053815. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert hectares to acres?
Acres = hectares × 2.471053815. To reverse it, divide instead: hectares = acres ÷ 2.471053815, which is the same as multiplying by 0.4046856422.
Is the hectare bigger than the acre?
Yes. One hectare equals 2.47105 acres, so it is the larger unit.
Why does my answer differ slightly from other hectares to acres converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a hectare?
Ten thousand square metres, the international unit of land area.
What is a acre?
Originally the area one ox team could plough in a day; now exactly 4,046.86 m².
Hectares to acres reference table
| Hectares | Acres |
|---|---|
| 0.5 ha | 1.2355 ac |
| 1 ha | 2.4711 ac |
| 2 ha | 4.9421 ac |
| 3 ha | 7.4132 ac |
| 5 ha | 12.3553 ac |
| 10 ha | 24.7105 ac |
| 15 ha | 37.0658 ac |
| 20 ha | 49.4211 ac |
| 25 ha | 61.7763 ac |
| 50 ha | 123.5527 ac |
| 75 ha | 185.329 ac |
| 100 ha | 247.1054 ac |
| 250 ha | 617.7635 ac |
| 500 ha | 1,235.53 ac |
| 1000 ha | 2,471.05 ac |
Exact factor: 1 hectare = 2.471053815 acres. Values rounded for display.