Acres to Hectares
Convert acres (ac) to hectares (ha) instantly — with formula and reference table.
ac
ha
Quick answer: 1 ac = 0.404686 ha. To convert acres to hectares, multiply by ac × 0.404686.
Converting acres to hectares
This converter changes a value in acres (ac) into hectares (ha). One acre equals 0.404686 ha. One acre equals 0.404686 hectares. A hectare is 10,000 square metres. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
ha = ac × 0.404686
Example
Convert 10 ac to ha: 10 × 0.404686 = 4.046856 ha.
Acres to Hectares conversion table
| Acres (ac) | Hectares (ha) |
|---|---|
| 1 ac | 0.404686 ha |
| 2 ac | 0.809371 ha |
| 3 ac | 1.214057 ha |
| 5 ac | 2.023428 ha |
| 10 ac | 4.046856 ha |
| 20 ac | 8.093713 ha |
| 25 ac | 10.117141 ha |
| 50 ac | 20.234282 ha |
| 100 ac | 40.468564 ha |
How to use this converter
- Enter a value in the acres (ac) field.
- Read the converted value in hectares (ha) below.
- Type into the ha field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many hectares are in an acre?
1 acre equals 0.404686 hectares.
How do I convert 100 acres to hectares?
100 times 0.404686 = 40.47 hectares.
How big is an acre?
An acre is 43,560 square feet, roughly the size of an American football field without the end zones.