How to use Acres to Hectares
- Type a value in acres.
- The result in hectares appears instantly.
- Type in the second box to convert the other way.
How to convert acres to hectares
Multiply the value in acres by 0.404686. Formula: ha = ac ÷ 2.4711. Example: 10 ac × 0.404686 = 4.0469 ha.
Common acres to hectares conversions
5 ac = 2.0234 ha. 25 ac = 10.1171 ha. 50 ac = 20.2343 ha. 100 ac = 40.4686 ha.
Quick mental math
Quick estimate: multiply by 0.4. 10 acres ≈ 4 hectares (exact: 4.05 ha).
Where is ac to ha conversion used?
Area conversions are common in real estate (flat and plot sizes in square feet or square meters), farming and land records (acres and hectares), flooring and tiling estimates, and painting or construction quotes.
What are acres?
An acre is 43,560 square feet, about 4,047 m². It is used for land and farm sizes in the US, UK and India.
What are hectares?
A hectare is 10,000 square meters (a 100 m × 100 m square). It is the metric unit for land and farms.
Acres to hectares conversion table
| Acres (ac) | Hectares (ha) |
|---|---|
| 1 | 0.404686 |
| 2 | 0.809371 |
| 5 | 2.0234 |
| 10 | 4.0469 |
| 20 | 8.0937 |
| 50 | 20.2343 |
| 100 | 40.4686 |
| 200 | 80.9371 |
| 250 | 101.1714 |
| 500 | 202.3428 |
| 1,000 | 404.6856 |
| 1,500 | 607.0285 |
| 2,000 | 809.3713 |
| 5,000 | 2,023.43 |
| 10,000 | 4,046.86 |
Frequently asked questions
How many hectares are in 1 acre?
1 acre = 0.404686 hectares (1 ac = 0.404686 ha).
How many acres are in 1 hectare?
1 hectare = 2.4711 acres (1 ha = 2.4711 ac).
What is 10 ac in hectares?
10 ac = 4.0469 ha.
What is 100 ac in hectares?
100 ac = 40.4686 ha.
Is the ac to ha conversion exact?
Yes. Area factors come from exact length definitions (1 ft = 0.3048 m), so square feet, acres and hectares convert exactly. Results are rounded only for display.
Last updated: · Free to use, no sign-up.