AreaAcres to hectares
1 acre = 0.404686 hectares.
1 acre = 0.404686 hectares. Multiply by 0.404686.
Common amounts
| acre | ha |
|---|---|
| 1 acre | 0.404686 ha |
| 10 acre | 4.0469 ha |
| 50 acre | 20.2343 ha |
| 100 acre | 40.4686 ha |
How it works
How to convert acres to hectares
ha = ac × 0.404686.
Worked examples: 5 acres = 2.0234 hectares; 50 acres = 20.2343 hectares.
About acres and hectares
An acre is 43,560 square feet, or 4,046.86 square meters; it is the usual land unit in the US, UK and India. A hectare is a square 100 meters on each side, so 10,000 square meters; it is the metric unit for farms and forests.
When you'd convert acres to hectares
Use it for land listings, farm subsidies and survey papers that mix units.
Quick check: 2.5 acres is about one hectare.
Common mistake: area factors are the square of length factors, so 1 m is 3.28 ft but 1 m² is 10.76 sq ft.
To go the other way, use the hectares to acres converter.
The converter on this page works out the answer in your browser as you type, and shows the factor so you can check it by hand.
Questions
How do I convert acres to hectares?
1 acre = 0.404686 hectares. Multiply by 0.404686.
What does the Converter : Units app add?
The same conversion, plus history, a constants library, and the rest of the unit categories on the phone.