Acres to Hectares Converter
Convert acres (acres) to hectares (ha) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
Acres to Hectares formula
ha = acres × 0.40468564224
1 acre = 0.4047 hectares · 1 hectare = 2.47 acres
To convert acres to hectares, multiply the value by 0.40468564224. For example, 10 acres:
ha = 10 × 0.40468564224ha = 4.046856
So 10 acres = 4.05 ha.
Mental math shortcut
Quick mental estimate: multiply by 0.4. For 10 acres that gives about 4 ha — off by 0.0469 ha (1.2%). Use the exact formula when precision matters.
Acres to Hectares conversion table
Hectares back to Acres
The same values converted the other way, rounded for everyday use:
| Hectares | Acres |
|---|---|
| 0.2023 ha | 0.4999 acres |
| 0.4047 ha | 1 acres |
| 0.8094 ha | 2 acres |
| 0.9996 ha | 2.47 acres |
| 2.02 ha | 4.99 acres |
| 4.05 ha | 10.01 acres |
| 16.19 ha | 40.01 acres |
| 40.47 ha | 100 acres |
About the units
Acres (acres)
An acre is 43,560 square feet (about 4,047 m²), used for land in the US and UK.
Hectares (ha)
A hectare is 10,000 square meters (100 m × 100 m), about 2.471 acres. It is the metric unit for land.
Frequently asked questions
How many hectares are in a acre?
One acre equals 0.4047 hectares.
What is 10 Acres in Hectares?
10 acres = 4.05 ha.
How do I convert Hectares back to Acres?
Divide the hectares by 0.40468564224. Or use the Hectares to Acres converter.