Acres to Hectares Converter
Convert acres (ac) to hectares (ha) instantly. Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet.
Result
- Hectares
- 0.404686 ha
How to use the acres to hectares converter
- Enter the acres (ac).
- The results update as you type, or press Calculate.
- Read the hectares first, then the supporting figures below it.
Formula
Hectares = acres × 0.4046856422
Worked example
For example, with these inputs:
- Acres (ac): 1
the calculator returns:
- Hectares: 0.404686 ha
Acres to Hectares table
| Acres | Hectares |
|---|---|
| 1 ac | 0.404686 ha |
| 2 ac | 0.809371 ha |
| 5 ac | 2.0234 ha |
| 10 ac | 4.0469 ha |
| 20 ac | 8.0937 ha |
| 25 ac | 10.1171 ha |
| 50 ac | 20.2343 ha |
| 100 ac | 40.4686 ha |
| 250 ac | 101.1714 ha |
| 500 ac | 202.3428 ha |
| 1,000 ac | 404.6856 ha |
About this conversion
Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Frequently asked questions
How many hectares are in one acre?
1 ac = 0.404686 ha.
How do I convert ac to ha?
Hectares = acres × 0.4046856422.