Acres to hectares●
Acres in. Hectares out. Convert land and farm sizes.
Area
Use a decimal point, for example 2.54. Scientific notation works too: 1e3.
Try a value
Pick an example to startThe formula
hectares = acres × 0.40468564224
Multiply the number of acres by 0.40468564224 to get hectares. To go the other way, divide by the same number.
A worked example
For 10 ac, multiply 10 by 0.40468564224. The result is approximately 4.046856 ha.
10 × 0.40468564224 ≈ 4.046856 ha
Quick reference
Reference values are rounded to 6 decimal places. Use the converter above for other values or precision.
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.25 | 0.101171 |
| 0.5 | 0.202343 |
| 1 | 0.404686 |
| 2 | 0.809371 |
| 5 | 2.023428 |
| 10 | 4.046856 |
| 25 | 10.117141 |
| 50 | 20.234282 |
| 100 | 40.468564 |
All equivalent units
The same value, in every supported unit.
Area conversions
For land, farms and parks.
Use this conversion for land listings and farm sizes. One acre is exactly 0.40468564224 hectares, so a hectare is about 2.47 acres.
Calculation details & precision
Area conversions use square metres as the base unit. Length factors are squared: 1 ft² = 0.09290304 m². A hectare is 10,000 m²; an international acre is 4,046.8564224 m². Historical US survey-foot definitions are not used.
Automatic displays up to 12 significant digits. Choose 2, 4 or 6 decimal places in Precision for a shorter result. Displayed results are rounded; very large or small values use scientific notation.
Common questions
How many acres are in a hectare?
One hectare is approximately 2.471054 acres.
How many hectares are in 10 acres?
10 ac is approximately 4.046856 ha. The converter can show more significant digits or round to a chosen number of decimal places.