How to convert acres to hectares
ha = ac × 0.4046856422
Example: 5 ac × 0.4046856422 = 2.023428211 ha
Acres to Hectares table
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.5 ac | 0.20234282 ha |
| 1 ac | 0.40468564 ha |
| 2 ac | 0.80937128 ha |
| 3 ac | 1.2140569 ha |
| 4 ac | 1.6187426 ha |
| 5 ac | 2.0234282 ha |
| 6 ac | 2.4281139 ha |
| 7 ac | 2.8327995 ha |
| 8 ac | 3.2374851 ha |
| 9 ac | 3.6421708 ha |
| 10 ac | 4.0468564 ha |
| 15 ac | 6.0702846 ha |
| 20 ac | 8.0937128 ha |
| 25 ac | 10.117141 ha |
| 30 ac | 12.140569 ha |
| 40 ac | 16.187426 ha |
| 50 ac | 20.234282 ha |
| 75 ac | 30.351423 ha |
| 100 ac | 40.468564 ha |
| 250 ac | 101.17141 ha |
| 500 ac | 202.34282 ha |
| 1,000 ac | 404.68564 ha |
About these units
Acres (ac): An acre is 43,560 square feet, or exactly 4,046.8564224 m². It is the usual unit for farmland and plots in the US, UK and South Asia.
Hectares (ha): A hectare is 10,000 m² (a square 100 m on each side), about 2.471 acres. It is the standard metric unit for land.
Frequently asked questions
How many hectares are in 1 acre?
1 acre equals 0.4046856422 hectares (ha).
How do I convert ac to ha?
Multiply the value in acres by 0.4046856422. For example, 5 ac × 0.4046856422 = 2.023428211 ha.
How do I convert hectares back to acres?
Multiply by 2.471053815 (or divide by 0.4046856422). 1 ha = 2.471053815 ac.
What is an acre?
An acre is 43,560 square feet, or exactly 4,046.8564224 m². It is the usual unit for farmland and plots in the US, UK and South Asia.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every area unit at once? Use the Area Converter.