Convert Acre (ac) to Hectare (ha)
Use our interactive area calculator to convert any value in real time, in both directions.
About the Acre → Hectare conversion
Conversions of area are essential in many everyday and technical contexts. Using consistent units and accurate factors ensures precise results.
The exact factor between Acre and Hectare is 0.40468564. This means that 1 ac equals 0.40468564 ha. To convert any value, just multiply. For the reverse direction, divide.
Formula
Conversion table
| Acre (ac) | Hectare (ha) |
|---|---|
| 1 | 0.4047 |
| 2 | 0.8094 |
| 5 | 2.0234 |
| 10 | 4.0469 |
| 25 | 10.1171 |
| 50 | 20.2343 |
| 100 | 40.4686 |
| 250 | 101.1714 |
| 500 | 202.3428 |
| 1000 | 404.6856 |
Reverse conversion
1 ha = 2.47105381 ac
Frequently asked questions
How do I convert Acre to Hectare?
Multiply the value in ac by the factor 0.40468564. That is, 1 ac = 0.40468564 ha. For the reverse conversion, use the factor 2.47105381.
What is the difference between Acre and Hectare?
Both measure area, but on different scales. Acre is used in some contexts while Hectare in others. To compare, always use the conversion factor: 1 ac = 0.40468564 ha.
Are the factors used official?
Yes. The conversion factors come from the International System of Units (SI) and recognized international standards (NIST, BIPM). The result is accurate for technical, scientific, and commercial use.
Can I print this page?
Yes. The page is static and prints well in any browser. The table of common values is useful as a printed reference for workshops, kitchens, and classrooms.