Convert ac to ha instantly — formula, worked examples and a conversion table of common values.
Convert acres (ac) to hectares (ha). Enter a value on either side and the other updates instantly — nothing is sent to a server.
One acre equals 0.404686 ha. The table below lists the values people look up most often, and each one links to a page with the worked calculation.
ha = ac ÷ 2.471054| Acre (ac) | Hectare (ha) |
|---|---|
| 0.1 | 0.0404686 |
| 0.5 | 0.202343 |
| 1 | 0.404686 |
| 2 | 0.809371 |
| 3 | 1.21406 |
| 5 | 2.02343 |
| 10 | 4.04686 |
| 15 | 6.07028 |
| 20 | 8.09371 |
| 25 | 10.1171 |
| 50 | 20.2343 |
| 75 | 30.3514 |
| 100 | 40.4686 |
| 250 | 101.171 |
| 500 | 202.343 |
| 1,000 | 404.686 |
1 acre = 0.404686 ha.
10 ac = 4.0469 ha.
100 ac = 40.4686 ha.
Use the formula ha = ac ÷ 2.471054. Or type any value into the converter above — it works in both directions.