Acres to Hectares Converter
Enter an area in acres and the equivalent in hectares appears immediately. Below you will find the exact factor, the reverse rule for hectares to acres, worked examples and a table of common sizes.
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Created by the Reeliy Editorial Team. Last updated: Oct 19, 2026
How many hectares are in an acre?
One acre equals 0.40468564224 hectares. The factor is exact because the acre is defined as 4,046.8564224 square meters and a hectare is 10,000 square meters. Reading it the other way, one hectare is about 2.4710538 acres.
hectares = acres × 0.40468564224
acres = hectares ÷ 0.40468564224Equivalent to multiplying by 2.4710538.
Acre versus hectare
A hectare is a metric land unit: a square of 100 m by 100 m, or 10,000 square meters. The name combines hecto- (hundred) with are, a unit of 100 square meters. The hectare is not part of the SI proper, but it is accepted for use alongside it and is the everyday land unit across most of the world.
The acre comes from medieval English land measurement and survives mainly in the United States and, informally, in the United Kingdom and a few other countries. Since a hectare is about 2.47 acres, the number of hectares for a given piece of land is always a little over 40% of the number of acres.
How to convert acres to hectares
- Type the number of acres in the first box.
- Read the hectares in the second box; the value refreshes after each keystroke.
- For a quick estimate, multiply by 0.4 and add roughly one percent of that result.
Example 1: a 12.5-acre orchard is 12.5 × 0.40468564224 = 5.058570528, or 5.0586 ha to four decimals.
Example 2: an 80-acre field is 80 × 0.40468564224 = 32.3749 ha, and a 160-acre quarter section is 64.7497 ha.
Going back: a 50 ha estate is 50 ÷ 0.40468564224 = 123.5527 acres.
Acres to hectares conversion table
| Acres | Hectares (ha) |
|---|---|
| 0.1 | 0.0405 |
| 0.25 | 0.1012 |
| 0.5 | 0.2023 |
| 1 | 0.4047 |
| 2 | 0.8094 |
| 5 | 2.0234 |
| 10 | 4.0469 |
| 25 | 10.1171 |
| 50 | 20.2343 |
| 100 | 40.4686 |
| 500 | 202.3428 |
| 1,000 | 404.6856 |
Where the conversion matters
- Farming and forestry: trade reports, crop statistics and subsidies are usually published in hectares, while US listings still use acres.
- Real estate and planning: cross-border land purchases and zoning documents often need both numbers side by side.
- Conservation: protected areas and reforestation targets are set in hectares worldwide.
A hectare is also 10,000 square meters, so you can chain this tool with the acres to square feet converter or open the full area converter for other units.
Frequently asked questions
How many hectares are in an acre?
One acre is 0.40468564224 hectares, usually rounded to 0.4047.
How many acres are in a hectare?
One hectare is about 2.4710538 acres, which is 10,000 square meters divided by 4,046.8564224.
Which is bigger, an acre or a hectare?
The hectare. It is roughly two and a half times the size of an acre.
How do I convert 100 acres to hectares?
Multiply 100 by 0.40468564224 to get 40.4686 hectares.
References
- Bureau International des Poids et Mesures, The International System of Units (SI Brochure), 9th edition, for the hectare as a unit accepted for use with the SI.
- Thompson, A. and Taylor, B. N. (2008). Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 edition.
Cite this converter and page
If you use this page in your work, you can cite it as:
Reeliy Editorial Team. (2026). Acres to Hectares Converter. Reeliy. https://reeliy.com/converters/convert-acres-to-hectares“Acres to Hectares Converter.” Reeliy, 2026, https://reeliy.com/converters/convert-acres-to-hectares.