Acres to Hectares
An acre is 4,840 square yards, roughly the size of a football field, the traditional unit for land area in the US and UK. A hectare is 10,000 square meters, the standard unit for measuring farmland and forest area. 1 ac equals ≈0.404686 ha, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to area, measured here against area's base unit (m²) — every other area unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
ha = ac × ≈0.404686
ac = ha × ≈2.47105
Worked example: 5 ac × ≈0.404686 = ≈2.02343 ha.
Conversion table
| Acre (ac) | Hectare (ha) |
|---|---|
| 1 ac | ≈0.404686 ha |
| 2 ac | ≈0.809371 ha |
| 3 ac | ≈1.21406 ha |
| 5 ac | ≈2.02343 ha |
| 10 ac | ≈4.04686 ha |
| 20 ac | ≈8.09371 ha |
| 25 ac | ≈10.1171 ha |
| 50 ac | ≈20.2343 ha |
| 100 ac | ≈40.4686 ha |
| 250 ac | ≈101.171 ha |
| 500 ac | ≈202.343 ha |
| 1,000 ac | ≈404.686 ha |
Frequently asked
- How many Hectares in a acre?
- 1 ac equals ≈0.404686 ha.
- How do I convert Acres to Hectares?
- Multiply the value in ac by ≈0.404686 to get ha. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Acre and Hectare are both defined by a fixed conversion factor to area's base unit (m²), so the result shown is exact to the precision displayed, not an approximation.