Acres to hectares
Convert acres to hectares. To convert acres to hectares, multiply by 0.4047.
Factors from their legal definitions.
Show the workings
| Step | Sum | Answer |
|---|---|---|
| One acre in square metres | 4,840 × (0.9144 m)² | 4,046.856 m² |
| One hectare in square metres | 10,000 m² | 10,000 m² |
| 1 acre in square metres | 1 × 4,046.9 | 4,046.856 m² |
| In hectares | 4,046.9 ÷ 10,000 | 0.405 ha |
Where the figures come from
- A yard in metres: 0.914 m per yard. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
- Square yards in an acre: 4,840 square yards per acre. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
- Square metres in a hectare: 10,000 m2 per hectare. Source: Weights and Measures Act 1985, Schedule 1. Checked 13 November 2026.
Acres to hectares table
| Acres | Hectares |
|---|---|
| 0.5 acres | 0.2023 ha |
| 1 acres | 0.4047 ha |
| 2 acres | 0.8094 ha |
| 3 acres | 1.214 ha |
| 4 acres | 1.619 ha |
| 5 acres | 2.023 ha |
| 6 acres | 2.428 ha |
| 7 acres | 2.833 ha |
| 8 acres | 3.237 ha |
| 9 acres | 3.642 ha |
| 10 acres | 4.047 ha |
| 12 acres | 4.856 ha |
| 15 acres | 6.07 ha |
| 20 acres | 8.094 ha |
| 25 acres | 10.117 ha |
| 30 acres | 12.141 ha |
| 40 acres | 16.187 ha |
| 50 acres | 20.234 ha |
| 75 acres | 30.351 ha |
| 100 acres | 40.469 ha |
How to convert acres to hectares
One acre is 0.4047 hectares, and one hectare is 2.471 acres. So to turn acres into hectares, multiply by 0.4047. For example, 1 acres × 0.4047 = 0.4047 hectares.
Where the numbers come from
Imperial units are defined in law as exact amounts of metric ones. These are the definitions this converter uses:
- A yard in metres: 0.914 m per yard. Source: Weights and Measures Act 1985, Schedule 1.
- Square yards in an acre: 4,840 square yards per acre. Source: Weights and Measures Act 1985, Schedule 1.
- Square metres in a hectare: 10,000 m2 per hectare. Source: Weights and Measures Act 1985, Schedule 1.