Acres to Hectares Converter
1 acre = 0.4046856 hectares
Type a value in either box: the conversion between acres (ac) and hectares (ha) updates instantly.
Good to know
In the US land survey system, a section is one square mile, or 640 acres (about 259 ha).
How to convert acres to hectares
To convert acres to hectares, multiply the number of acres by 0.4046856. To go the other way, multiply hectares by 2.471054.
ha = ac × 0.4046856
Worked examples
- 1 ac = 0.4046856 ha
- 5 ac = 2.023428 ha
- 40 ac = 16.18743 ha
- 640 ac = 258.9988 ha
Acres to Hectares conversion table
| Acres (ac) | Hectares (ha) |
|---|---|
| 1 ac | 0.4046856 ha |
| 2 ac | 0.8093713 ha |
| 3 ac | 1.214057 ha |
| 4 ac | 1.618743 ha |
| 5 ac | 2.023428 ha |
| 6 ac | 2.428114 ha |
| 7 ac | 2.832799 ha |
| 8 ac | 3.237485 ha |
| 9 ac | 3.642171 ha |
| 10 ac | 4.046856 ha |
| 15 ac | 6.070285 ha |
| 20 ac | 8.093713 ha |
| 25 ac | 10.11714 ha |
| 30 ac | 12.14057 ha |
| 40 ac | 16.18743 ha |
| 50 ac | 20.23428 ha |
| 75 ac | 30.35142 ha |
| 100 ac | 40.46856 ha |
| 250 ac | 101.1714 ha |
| 500 ac | 202.3428 ha |
| 1,000 ac | 404.6856 ha |
About the units
Acres (ac)
The acre (ac) equals 43,560 square feet, about 4,046.86 m². It is used for land in the US, the UK and several other countries.
Hectares (ha)
The hectare (ha) equals 10,000 square meters, a square of 100 m × 100 m. It is the standard unit for farmland and land plots in metric countries.
Frequently asked questions
How do I convert acres to hectares?
ha = ac × 0.4046856What is 5 ac in hectares?
How many hectares are in an acre?
How many acres are in a hectare?
Conversion factors use exact international definitions where they exist (for example 1 inch = 2.54 cm and 1 lb = 0.45359237 kg). Results are rounded for display only.