Acres to Hectares
Convert acres to hectares instantly.
Acres to Hectares (ac to ha) Converter
1 acre = 0.40469 hectares
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- 1 ac = 0.40469 ha
- 5 ac = 2.0234 ha
- 10 ac = 4.0469 ha
- 25 ac = 10.117 ha
- Square metresm²
- Square feetft²
- Acresac
- Square metresm²
- Hectaresha
- Square feetft²
How it’s calculated
ha = ac × 0.4046856422
- Multiply the value in acres by 0.4046856422.
- To go back, divide by 0.4046856422 (or multiply by 2.471053815).
- 1 ac = 0.4046856422 ha · 1 ha = 2.471053815 ac
Quick examples
1 acre = 0.40469 hectares · 1 ha = 2.4711 ac
- 1 acre = 0.40469 hectares
- 5 acres = 2.0234 hectares
- 10 acres = 4.0469 hectares
- 25 acres = 10.117 hectares
- 100 acres = 40.469 hectares
Acres to hectares conversion table
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.1 ac | 0.040469 ha |
| 0.5 ac | 0.20234 ha |
| 1 ac | 0.40469 ha |
| 2 ac | 0.80937 ha |
| 3 ac | 1.2141 ha |
| 4 ac | 1.6187 ha |
| 5 ac | 2.0234 ha |
| 6 ac | 2.4281 ha |
| 7 ac | 2.8328 ha |
| 8 ac | 3.2375 ha |
| 9 ac | 3.6422 ha |
| 10 ac | 4.0469 ha |
| 15 ac | 6.0703 ha |
| 20 ac | 8.0937 ha |
| 25 ac | 10.117 ha |
| 30 ac | 12.141 ha |
| 40 ac | 16.187 ha |
| 50 ac | 20.234 ha |
| 75 ac | 30.351 ha |
| 100 ac | 40.469 ha |
| 250 ac | 101.17 ha |
| 500 ac | 202.34 ha |
| 1,000 ac | 404.69 ha |
About these units
Acre (ac)
US & imperial (identical)
1 ac = 4,046.8564224 m² (exact)
The international acre: 43,560 square feet, or exactly 4,046.8564224 m².
Source: NIST SP 811 / Handbook 44
Hectare (ha)
metric (non-SI)
1 ha = 10,000 m² (exact)
Defined as exactly 10,000 m² (a square 100 m on each side).
Source: BIPM SI Brochure (9th ed.)
Frequently asked questions
How do I convert acres to hectares?
Use ha = ac × 0.4046856422. Multiply the value in acres by 0.4046856422.
How many hectares are in 1 acre?
1 acre (ac) equals 0.40469 hectares (ha); more precisely 0.4046856422.
How many acres are in 1 hectare?
1 hectare (ha) equals 2.4711 acres (ac); more precisely 2.471053815.
What is 10 ac in ha?
10 acres = 4.0469 hectares.
What is a acre?
The international acre: 43,560 square feet, or exactly 4,046.8564224 m².
What is a hectare?
Defined as exactly 10,000 m² (a square 100 m on each side).
Related conversions
Formula: ha = ac × 0.4046856422. Factors last reviewed 2026-10-27.