Convert acres (ac) to hectares (ha).
Edit either value. Decimals and scientific notation supported.
No units found. Try a name or symbol.
No units found. Try a name or symbol.
1 ac ≈ 0.4046856422 ha
Precision changes displayed rounding, not calculation accuracy.
ha = ac × 0.40468564224ha = ac × 0.40468564224
Multiply the ac reading by 0.40468564224.
1 ac ≈ 0.4046856422 ha
1 × 0.40468564224 ≈ 0.4046856422
640 ac ≈ 258.998811 ha
640 × 0.40468564224 ≈ 258.998811
Area factors scale with the square of the length factor. For example, 1 ft = 0.3048 m gives 1 ft² = 0.3048² m² = 0.09290304 m².
Fixed reference · Acre to Hectare
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
| Acre (ac) | Hectare (ha) |
|---|---|
| 0 | 0 |
| 0.1 | 0.04046856422 |
| 0.5 | 0.2023428211 |
| 1 | 0.4046856422 |
| 2 | 0.8093712845 |
| 5 | 2.023428211 |
| 10 | 4.046856422 |
| 25 | 10.11714106 |
| 50 | 20.23428211 |
| 100 | 40.46856422 |
| 1000 | 404.6856422 |
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