Acre to Hectare
Free instant acre to hectare converter. 1 ac = 0.404686 ha.
Common Acre to Hectare values
| Acre (ac) | Hectare (ha) |
|---|---|
| 1 | 0.404686 |
| 5 | 2.02343 |
| 10 | 4.04686 |
| 25 | 10.1171 |
| 50 | 20.2343 |
| 100 | 40.4686 |
| 500 | 202.343 |
| 1000 | 404.686 |
How does Acre to Hectare conversion work?
Type a value in the Acre (ac) field and the equivalent in Hectare (ha) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Acre. The traditional land-area unit in the US, UK, and many former British colonies. About 4,047 square metres.
Hectare. A square 100 metres on each side. About 2.47 acres. The standard land-area unit in most metric countries.
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Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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