Convert Acres to Hectares
Acres (Acre) to Hectares (ha) — the formula, a worked example and a live converter, all in your browser.
Acres to Hectares formula
To convert a measurement, multiply it by the fixed factor below:
ha = Acre × 0.4046856422
Worked example
1 Acre = 1 × 0.4046856422 = 0.4046856422 ha.
Acres to Hectares conversion table
| Acres (Acre) | Hectares (ha) |
|---|---|
| 1 | 0.4046856422 |
| 5 | 2.023428211 |
| 10 | 4.046856422 |
| 25 | 10.11714106 |
| 50 | 20.23428211 |
| 100 | 40.46856422 |
Common uses
Useful for converting US and UK land areas in acres into the metric hectares used elsewhere.
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Frequently asked questions
What is the formula to convert acres to hectares?
Multiply the number of acres by 0.4046856422 to get hectares (ha = Acre × 0.4046856422).
How many hectares are in a acre?
One acre equals 0.4046856422 hectares.
Is this converter accurate?
Yes. It uses the exact internationally-defined conversion factors and runs entirely in your browser, so results match standards tables and nothing you type is uploaded.