Acres to Hectares ConverterRight in Your Browser
Convert acres (ac) to hectares (ha). The acre is the traditional US and UK unit for farmland and plots — about three quarters of a football field. The hectare (ha) is 10,000 square meters — the metric unit for farms, parks and forests worldwide. Everything is calculated locally in your browser — no server, and it works offline.
0.404686 ha
in hectares (hectare)
To convert acres to hectares, multiply the acre value by 0.404686.
Switch to Hectares to AcresAcres to Hectares Chart
| Acres (ac) | Hectares (ha) |
|---|---|
| 1 | 0.404686 |
| 2 | 0.809371 |
| 3 | 1.21406 |
| 4 | 1.61874 |
| 5 | 2.02343 |
| 10 | 4.04686 |
| 20 | 8.09371 |
| 50 | 20.2343 |
| 100 | 40.4686 |
Frequently Asked Questions
How many hectares are in a acre?
One acre equals 0.404686 hectares (1 ac = 0.404686 ha). So to go from acres to hectares, multiply the acre value by 0.404686.
What is the formula to convert acres to hectares?
To convert acres to hectares, multiply the acre value by 0.404686. For example, 10 ac is 4.04686 ha.
What is 5 acres in hectares?
5 acres — a small hobby farm — is 2.02343 hectares. The converter above works for any value, entirely in your browser.
Is the acre to hectare conversion exact?
The factor used here is the defined value: 1 ac = 0.4046856422 ha. Results are rounded to six significant digits for readability, so for high-precision work use the full factor.