How to convert acres to hectares
To convert acres to hectares, multiply the value by the conversion factor 0.4046856422. To go the other way, multiply by 2.471053815 (or divide by 0.4046856422).
Worked example: 5 ac to ha
- Write the value: 5 ac
- Multiply by 0.4046856422: 5 × 0.4046856422
- Result: 2.02343 ha
Acre to Hectare conversion table
Quick reference values, rounded to 6 significant digits.
| Acre (ac) | Hectare (ha) |
|---|---|
| 0.1 ac | 0.0404686 ha |
| 0.25 ac | 0.101171 ha |
| 0.5 ac | 0.202343 ha |
| 1 ac | 0.404686 ha |
| 2 ac | 0.809371 ha |
| 3 ac | 1.21406 ha |
| 4 ac | 1.61874 ha |
| 5 ac | 2.02343 ha |
| 6 ac | 2.42811 ha |
| 7 ac | 2.8328 ha |
| 8 ac | 3.23749 ha |
| 9 ac | 3.64217 ha |
| 10 ac | 4.04686 ha |
| 12 ac | 4.85623 ha |
| 15 ac | 6.07028 ha |
| 20 ac | 8.09371 ha |
| 25 ac | 10.1171 ha |
| 30 ac | 12.1406 ha |
| 40 ac | 16.1874 ha |
| 50 ac | 20.2343 ha |
| 75 ac | 30.3514 ha |
| 100 ac | 40.4686 ha |
| 250 ac | 101.171 ha |
| 500 ac | 202.343 ha |
| 1,000 ac | 404.686 ha |
Hectare to Acre
| ha | ac |
|---|---|
| 1 ha | 2.47105 ac |
| 5 ha | 12.3553 ac |
| 10 ha | 24.7105 ac |
| 50 ha | 123.553 ac |
| 100 ha | 247.105 ac |
1 Acre in other area & land units
About Acre and Hectare
What is a acre (ac)?
An acre equals 43,560 square feet or 100 decimal. It is used for agricultural land in Bangladesh, India, the UK and the US.
What is a hectare (ha)?
A hectare equals 10,000 m² (about 2.471 acres) and is the standard metric unit for farmland and forests.
Important for land buyers: traditional units like katha and bigha differ between districts. This converter uses the standard values used in Dhaka and most official calculations: 1 katha = 720 sq ft, 1 bigha = 20 katha = 14,400 sq ft, 1 decimal (shotok) = 435.6 sq ft, 1 acre = 100 decimal. Always confirm the local value written in your deed (দলিল) or with the land office (AC Land).
Where acre to hectare conversion is used
Area & land conversions are needed for buying and selling land, flats, deed (dolil) records, construction planning and farming. Converting between acres and hectares is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Area & Land Converter.
Frequently asked questions
How many hectares are in 1 acre?
1 Acre equals 0.404686 ha.
How do I convert acres to hectares?
Multiply the number of acres by 0.4046856422. For example, 5 ac × 0.4046856422 = 2.02343 ha.
What is 5 ac in ha?
5 ac = 2.02343 ha.
How many acres are in 1 hectare?
1 Hectare equals 2.47105 ac. Use the Hectare to Acre converter for the reverse direction.
Is this Acre to Hectare converter accurate?
Yes. It uses exact internationally defined conversion factors and the standard Bangladeshi values for traditional units, calculated with full floating-point precision. Results are displayed rounded for readability.