Acres to hectares
Type a value in either box. 1 ac = 0.404686 ha.
Last updated
How to convert
To convert acres to hectares, divide by 2.471054 (or multiply by 0.404686).
ha = ac × 0.404686
For example: 20 ac ÷ 2.471054 = 8.0937 ha.
An acre is exactly 4,046.8564224 square metres.
In your head: Multiply by 0.4 (it reads about 1% low): 50 acres ≈ 20 ha (exactly 20.23).
When you’ll need it
Older deeds and land sales are in acres. A square mile is 640 acres, or 259 hectares.
Common values
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.25 ac | 0.1012 ha |
| 0.5 ac | 0.2023 ha |
| 1 ac | 0.4047 ha |
| 2 ac | 0.8094 ha |
| 5 ac | 2.0234 ha |
| 10 ac | 4.0469 ha |
| 20 ac | 8.0937 ha |
| 40 ac | 16.1874 ha |
| 50 ac | 20.2343 ha |
| 100 ac | 40.4686 ha |
| 500 ac | 202.3428 ha |
| 640 ac | 258.9988 ha |
Questions
- How many acres make a hectare?
- 1 hectare is 2.471054 acres, so 1 acre = 0.404686 hectares.
- What is the formula to convert acres to hectares?
- ha = ac × 0.404686. An acre is exactly 4,046.8564224 square metres.
- What is 20 acres in hectares?
- 20 acres is 8.0937 hectares.