Acres to Hectares Converter
1 acre = 0.404686 hectares.
Enter a value
Result
1 acre =
0.404686 ha
1 ac × 0.404686 = 0.404686 ha
1 ft² = 0.09290304 m² exactly
The working
- 1. Convert 1 ac to square metres: 1 × 4,046.86 = 4,046.86.
- 2. Convert to ha: 4,046.86 ÷ 10,000 = 0.404686.
1 ac in every unit
Sizes for scale
- Studio flat
- 37 m² (400 ft²)
- Tennis court
- 261 m²
- Football pitch
- 7,140 m²
- One acre
- 4,047 m²
Conversion table
Acres to Hectares
| Acres | Hectares |
|---|---|
| 1 | 0.40469 |
| 2 | 0.80937 |
| 3 | 1.2141 |
| 4 | 1.6187 |
| 5 | 2.0234 |
| 6 | 2.4281 |
| 7 | 2.8328 |
| 8 | 3.2375 |
| 9 | 3.6422 |
| 10 | 4.0469 |
| 15 | 6.0703 |
| 20 | 8.0937 |
| 25 | 10.117 |
| 50 | 20.234 |
| 100 | 40.469 |
Hectares to Acres
| Hectares | Acres |
|---|---|
| 1 | 2.4711 |
| 2 | 4.9421 |
| 3 | 7.4132 |
| 4 | 9.8842 |
| 5 | 12.355 |
| 6 | 14.826 |
| 7 | 17.297 |
| 8 | 19.768 |
| 9 | 22.239 |
| 10 | 24.711 |
| 15 | 37.066 |
| 20 | 49.421 |
| 25 | 61.776 |
| 50 | 123.55 |
| 100 | 247.11 |
Formula and worked example
hectares = acres × 0.4046856422 (1 acre is exactly 4,046.8564224 m²; 1 hectare is exactly 10,000 m²).
Convert 10 acres to hectares: 10 × 0.40468564 = 4.04686 ha.
When you need this
Farmland and building plots are sold in acres in the UK and US but in hectares in most other countries and in EU farm subsidies.
Questions people ask
How many hectares are in a acre?
One acre is 0.40468564 hectares. 1 acre is exactly 4,046.8564224 m².
How do I convert acres to hectares?
Multiply the number of acres by 0.40468564, or divide by 2.4710538.
What is 10 ac in ha?
10 acres is 4.04686 hectares.
How do I convert hectares back to acres?
Multiply by 2.4710538: one hectare is 2.4710538 acres.
Related conversions
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
Spotted a mistake? Tell us and we'll check it. How we check our calculators