Hectares to acres (ha to ac)
The answer, the exact formula and a table with the values people look up most.
1 ha = 2.47105 ac1 ac = 0.404686 haAcres = Hectares × 2.47105381467Example: 5 ha = 12.3553 ac
1 ha = 2.471053815 acre
Conversions people ask for most
Convert hectares to acres
| ha | ac |
|---|---|
| 0.1 ha | 0.24711 ac |
| 0.25 ha | 0.61776 ac |
| 0.5 ha | 1.2355 ac |
| 1 ha | 2.4711 ac |
| 2 ha | 4.9421 ac |
| 3 ha | 7.4132 ac |
| 5 ha | 12.355 ac |
| 10 ha | 24.711 ac |
| 20 ha | 49.421 ac |
| 50 ha | 123.55 ac |
| 100 ha | 247.11 ac |
| 500 ha | 1235.5 ac |
| 1000 ha | 2471.1 ac |
The factor is exact: it comes from the official definition of the units. The table rounds to a few decimals; the converter above gives up to 10 significant digits.
The two units
Hectare ha
A hectare is 10,000 square meters (a square 100 m on each side); it is the usual unit for farmland.
Acre ac
An acre is 43,560 square feet, about 4,047 m² or 0.405 hectares; land in the US and the UK is sold by the acre.
Frequently asked questions
How many acres are 5 hectares?
5 ha = 12.3553 ac.
What is the formula to convert hectares to acres?
Acres = Hectares × 2.47105381467. 5 ha = 12.3553 ac.
Is this conversion exact?
Yes. The factor comes from the international definition of both units, so the only difference you may see is rounding.