Convert acres to hectares
1 ac = 0.40468564224 ha — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.404 685 642 24ha
Exact decimal: 0.40468564224
As a fraction: 158080329/390625000
1 ac = 0.40468564224 ha
How to convert acres to hectares
Multiply the number of acres by 0.40468564224 to get hectares.
The exact factor is 0.40468564224 — as a fraction, 158080329/390625000.
Acre: Exactly 4840 square yards — historically a day of ploughing.
Hectare: The standard land-area unit almost everywhere outside the US.
Acre to Hectare conversion table
| Acres (ac) | Hectares (ha) |
|---|---|
| 1 ac | 0.404 685 64 |
| 2 ac | 0.809 371 28 |
| 3 ac | 1.214 056 9 |
| 5 ac | 2.023 428 2 |
| 10 ac | 4.046 856 4 |
| 20 ac | 8.093 712 8 |
| 25 ac | 10.117 141 |
| 50 ac | 20.234 282 |
| 100 ac | 40.468 564 |
| 250 ac | 101.171 41 |
| 500 ac | 202.342 82 |
| 1000 ac | 404.685 64 |
Hectare to Acre conversion table
| Hectares (ha) | Acres (ac) |
|---|---|
| 1 ha | 2.471 053 8 |
| 2 ha | 4.942 107 6 |
| 3 ha | 7.413 161 4 |
| 5 ha | 12.355 269 |
| 10 ha | 24.710 538 |
| 20 ha | 49.421 076 |
| 25 ha | 61.776 345 |
| 50 ha | 123.552 69 |
| 100 ha | 247.105 38 |
| 250 ha | 617.763 45 |
| 500 ha | 1235.5269 |
| 1000 ha | 2471.0538 |
Frequently asked
How many hectares are in a acre?
One acre equals 0.4046856422 hectares (ac → ha). That figure is exact, not rounded.
How do you convert acres to hectares?
Multiply the number of acres by 0.40468564224 to get hectares.
What is 1 ha in acres?
One hectare is 2.471053815 acres.
What is 10 ac in ha?
10 ac = 4.046 856 4 ha.
What exactly is a acre?
Exactly 4840 square yards — historically a day of ploughing.
What exactly is a hectare?
The standard land-area unit almost everywhere outside the US.