Acres to Hectares Converter
Convert acres to hectares. The formula used here is 1 acre = 0.40468564224 hectares. The formula is ha = ac × 0.40468564224; 1 ac is 0.404686 ha.
A land area unit equal to 43,560 square feet.
A metric land area unit equal to 10,000 square meters.
Start with your value in acres, then apply the formula below. It stays visible so you can catch rounding mistakes instead of just copying the output.
For property and construction decisions, carry the converted area with the source unit, rounding rule, and any assumptions about measured boundaries.
Area conversions square the underlying length scale, so small changes in length can become larger changes in area for large rooms or parcels. This page displays converted values with up to 6 decimal places by default.
| Acres | Hectares |
|---|---|
| 0.25 ac | 0.101171 ha |
| 0.5 ac | 0.202343 ha |
| 1 ac | 0.404686 ha |
| 5 ac | 2.023428 ha |
| 10 ac | 4.046856 ha |
| 100 ac | 40.468564 ha |
Useful for real-estate, land, and property records. Use the same formula with your exact input if the measurement needs to be documented.
Useful for flooring, paint, and construction estimates. Use the same formula with your exact input if the measurement needs to be documented.
Useful for mapping, agriculture, and site planning. Use the same formula with your exact input if the measurement needs to be documented.
How do I convert acres to hectares?
Enter the value in acres and apply ha = ac × 0.40468564224. Round the hectares result after the conversion, not before.
What is 1 acre in hectares?
1 ac equals 0.404686 ha with the current rounding setting. Keep more decimal places when the result feeds another calculation.
What is 0.25 ac in ha?
0.25 ac is 0.101171 ha. It appears in the lookup table so you can compare it with nearby amounts.
Can I convert hectares back to acres?
Yes. Use the reverse Hectares to Acres converter if you need to go the other direction.
How accurate is this acres to hectares conversion?
The calculator runs the formula in your browser and rounds results to 6 decimal places by default. Area conversions square the underlying length scale, so small changes in length can become larger changes in area for large rooms or parcels.