Multiply hectares by 2.47105 to get acres. A hectare is a square 100 m on each side, a bit larger than two football pitches.
How to use the Hectares to Acres Converter
- Type the number of hectares into the Hectares field. Decimals such as 0.5 are fine.
- Read the answer in Acres – it updates as you type, with no button to press.
- To convert the other way, type into Acres and the hectares are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only ha ⇄ acre. Need a different unit? Use the general area converter, where you can choose any “from” and “to” unit.
How it works
Both units measure area, so they are always in the same ratio: one hectare equals 2.4710538 acres. The calculator multiplies the number of hectares you type by 2.4710538 to give acres, and when you type into the acres field it divides by the same factor to give hectares. Because the ratio never changes, doubling the hectares always doubles the acres. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert hectares to acres
- Write down the value in hectares, for example 1 ha.
- Multiply by the conversion factor 2.4710538 (because 1 hectare = 2.4710538 acre).
- 1 × 2.4710538 = 2.4710538 acre.
- To go back from acres to hectares, divide by 2.4710538 – or multiply by 0.40468564.
ha to acre conversion table
| Hectares | Acres | Acres | Hectares |
|---|---|---|---|
| 0.1 ha | 0.24710538 acre | 1 acre | 0.40468564 ha |
| 0.5 ha | 1.2355269 acre | 2 acre | 0.80937128 ha |
| 1 ha | 2.4710538 acre | 5 acre | 2.0234282 ha |
| 2 ha | 4.9421076 acre | 10 acre | 4.0468564 ha |
| 5 ha | 12.355269 acre | 20 acre | 8.0937128 ha |
| 10 ha | 24.710538 acre | 50 acre | 20.234282 ha |
| 20 ha | 49.421076 acre | 100 acre | 40.468564 ha |
| 50 ha | 123.55269 acre | 1,000 acre | 404.68564 ha |
| 100 ha | 247.10538 acre | ||
| 1,000 ha | 2,471.0538 acre |
What is a hectare?
A hectare is 10,000 m², a square 100 m on each side. Farmland and forests are measured in hectares in most countries; one hectare is about 2.471 acres.
What is an acre?
An acre is exactly 43,560 square feet, about 4,047 m². Historically it was the land a team of oxen could plough in a day. It remains the land unit in the U.S. and UK.
Quick mental conversion
For a fast estimate, multiply hectares by about 2.5 to get acres; the error is about 1.2%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Converting area with a length factor (1 m = 3.28 ft, but 1 m² = 10.76 ft², not 3.28 ft²), and assuming regional land units such as marla, bigha or katha have one standard size everywhere.
Formula
1 ha = 2.4710538 acre1 acre = 0.40468564 haacre = ha × 2.4710538Worked example
Inputs — Hectares: 1 ha.
Results — Acres = 2.47105381 acre.
Frequently asked questions
How many acres in a hectare?
About 2.471 acres.
How big is a hectare?
10,000 m².
How do I convert hectares to acres?
Multiply the number of hectares by 2.4710538. For example, 1 ha × 2.4710538 = 2.4710538 acre.
How do I convert acres back to hectares?
Divide by 2.4710538 (or multiply by 0.40468564), or simply type the value into the acres field above.
What is 10 ha in acres?
10 ha = 24.710538 acre.
What is 100 ha in acres?
100 ha = 247.10538 acre.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between hectares and acres. To pick any area unit, use the general area converter linked under Related calculators.
What formula does the Hectares to Acres Converter use?
1 ha = 2.4710538 acre.