The short answer
- 1 ac ≈ 0.4046856 ha
- 1 ha ≈ 2.471054 ac
Worked example10 ac × 0.4046856422 = 4.046856 ha
UNIT CONVERSION
← Area converterAcres to hectares
To convert acres to hectares, multiply the number of acres by 0.4046856422.
What the units mean
Acre. The international acre is 43,560 square feet, exactly 4,046.8564224 square metres.
Hectare. The hectare is 10,000 square metres, the area of a square 100 metres on each side.
Acres to hectares table
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.5 | 0.2023428 |
| 1 | 0.4046856 |
| 2 | 0.8093713 |
| 3 | 1.214057 |
| 4 | 1.618743 |
| 5 | 2.023428 |
| 6 | 2.428114 |
| 7 | 2.832799 |
| 8 | 3.237485 |
| 9 | 3.642171 |
| 10 | 4.046856 |
| 12 | 4.856228 |
| 15 | 6.070285 |
| 20 | 8.093713 |
| 25 | 10.11714 |
| 30 | 12.14057 |
| 40 | 16.18743 |
| 50 | 20.23428 |
| 60 | 24.28114 |
| 70 | 28.32799 |
| 75 | 30.35142 |
| 80 | 32.37485 |
| 90 | 36.42171 |
| 100 | 40.46856 |
| 150 | 60.70285 |
| 200 | 80.93713 |
| 250 | 101.1714 |
| 500 | 202.3428 |
| 1,000 | 404.6856 |
Values are rounded to 7 significant figures.
Common questions
How do I convert acres to hectares?
Multiply the number of acres by 0.4046856422. For example, 10 ac × 0.4046856422 = 4.046856 ha.
How many hectares are in one acre?
One acre is about 0.4046856 hectares.
Is this conversion exact?
Yes. Both units have exact legal definitions, so the factor is exact. Values on this page are rounded to 7 significant figures.