Acres to Hectares (ac to ha)
1 ac = 0.404686 ha
and 1 ha = 2.47105 ac
How to convert Acres to Hectares
ha = ac ÷ 2.47105
To convert, divide the number of acres by 2.47105. Example: 10 ac ÷ 2.47105 = 4.04686 ha.
1 acre is 43,560 ft² = exactly 4,046.8564224 m² = 0.40468564224 ha.
Used for farmland, plots of land, parks and estates when converting US or UK listings to metric.
Mental shortcut: multiply by 0.4 (underestimates by about 1.2%).
Acres to Hectares conversion chart
| Acres | Hectares |
|---|---|
| 0.25 ac | 0.1012 ha |
| 0.5 ac | 0.2023 ha |
| 0.75 ac | 0.3035 ha |
| 1 ac | 0.4047 ha |
| 2 ac | 0.8094 ha |
| 3 ac | 1.21 ha |
| 4 ac | 1.62 ha |
| 5 ac | 2.02 ha |
| 6 ac | 2.43 ha |
| 7 ac | 2.83 ha |
| 8 ac | 3.24 ha |
| 9 ac | 3.64 ha |
| 10 ac | 4.05 ha |
| 11 ac | 4.45 ha |
| 12 ac | 4.86 ha |
| 13 ac | 5.26 ha |
| 14 ac | 5.67 ha |
| 15 ac | 6.07 ha |
| 16 ac | 6.47 ha |
| 17 ac | 6.88 ha |
| 18 ac | 7.28 ha |
| 19 ac | 7.69 ha |
| 20 ac | 8.09 ha |
| 25 ac | 10.12 ha |
| 30 ac | 12.14 ha |
| 35 ac | 14.16 ha |
| 40 ac | 16.19 ha |
| 45 ac | 18.21 ha |
| 50 ac | 20.23 ha |
| Acres | Hectares |
|---|---|
| 55 ac | 22.26 ha |
| 60 ac | 24.28 ha |
| 65 ac | 26.3 ha |
| 70 ac | 28.33 ha |
| 75 ac | 30.35 ha |
| 80 ac | 32.37 ha |
| 85 ac | 34.4 ha |
| 90 ac | 36.42 ha |
| 95 ac | 38.45 ha |
| 100 ac | 40.47 ha |
| 150 ac | 60.7 ha |
| 200 ac | 80.94 ha |
| 250 ac | 101.17 ha |
| 300 ac | 121.41 ha |
| 350 ac | 141.64 ha |
| 400 ac | 161.87 ha |
| 450 ac | 182.11 ha |
| 500 ac | 202.34 ha |
| 550 ac | 222.58 ha |
| 600 ac | 242.81 ha |
| 650 ac | 263.05 ha |
| 700 ac | 283.28 ha |
| 750 ac | 303.51 ha |
| 800 ac | 323.75 ha |
| 850 ac | 343.98 ha |
| 900 ac | 364.22 ha |
| 950 ac | 384.45 ha |
| 1,000 ac | 404.69 ha |
Values rounded to 2 decimal places (4 below 1). Use the converter above for more precision.
Frequently asked questions
How many hectares are in 1 acre?
1 acre = 0.404686 hectares. 1 acre is 43,560 ft² = exactly 4,046.8564224 m² = 0.40468564224 ha.
How do I convert acres to hectares?
Divide the number of acres by 2.47105. Example: 10 ac ÷ 2.47105 = 4.04686 ha.
Is there a quick way to estimate ac to ha in your head?
Yes — multiply by 0.4. This underestimates by about 1.2%. Use the exact formula (ha = ac ÷ 2.47105) when precision matters.
How do I convert hectares back to acres?
Use ac = ha × 2.47105 — multiply the number of hectares by 2.47105. See the Hectares to Acres page for a full chart.