Acres to hectares – convert ac to ha
Convert acres to hectares (ac to ha) for fields, farms, land sales and mapping. This page links to the main area converter with acres → hectares pre-selected.
Open the interactive ac → ha converter:
Use main converter (ac → ha) or switch to ha → acOn the homepage you can also convert between acres, square metres, square feet and square kilometres with the same dropdowns.
Quick reference: acres to hectares
The converter uses the precise factor 1 acre = 0.40468564224 ha. Rounded values:
| Acres (ac) | Hectares (ha, approx.) |
|---|---|
| 0.25 ac | 0.10 ha |
| 0.5 ac | 0.20 ha |
| 1 ac | 0.40 ha |
| 2 ac | 0.81 ha |
| 5 ac | 2.02 ha |
| 10 ac | 4.05 ha |
| 20 ac | 8.09 ha |
Why convert acres to hectares?
Typical reasons include:
- Comparing land sizes between countries that use metric vs imperial units.
- Understanding property listings that quote both acres and hectares.
- Planning farming, forestry or conservation work with SI-based documents.
- Checking field, paddock or estate sizes on mixed-unit maps.
More land & area converters
All area units on the homepage convert via square metres as a base, keeping acres, hectares, ft², m² and km² consistent with one another.