CalcPairsAcres to Hectares Converter (ac to ha)
10 acres is 4.046856 hectares. One acre is exactly 0.40468564224 ha, so acres × 0.40468564224 gives hectares — a hectare is about two and a half acres, which makes it the bigger unit despite the smaller name recognition in the US.
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How this conversion works
Land is sold by the acre in the US and UK countryside and by the hectare almost everywhere else. Type either side: a 40-acre field is 16.19 ha; a 5-hectare vineyard is 12.36 acres.
An acre began as the area a team of oxen could plough in a day — one furlong long by one chain wide — which is why it lands at the odd size of 4,840 square yards. The hectare is the tidy modern unit: exactly 10,000 m², a square 100 m on a side. A football pitch is about 0.71 ha, or 1.76 acres.
The exact formula
hectares = acres × 0.40468564224
The acre is 4,840 square yards; at exactly 0.83612736 m² per square yard, that is 4,046.8564224 m² = 0.40468564224 ha. The reverse is acres = hectares ÷ 0.40468564224 (1 ha = 2.471054 acres).
Acres to Hectares conversion table
| Acres (acres) | Hectares (ha) |
|---|---|
| 1 | 0.404686 |
| 2 | 0.809371 |
| 3 | 1.214057 |
| 4 | 1.618743 |
| 5 | 2.023428 |
| 6 | 2.428114 |
| 7 | 2.832799 |
| 8 | 3.237485 |
| 9 | 3.642171 |
| 10 | 4.046856 |
| Acres (acres) | Hectares (ha) |
|---|---|
| 11 | 4.451542 |
| 12 | 4.856228 |
| 13 | 5.260913 |
| 14 | 5.665599 |
| 15 | 6.070285 |
| 16 | 6.47497 |
| 17 | 6.879656 |
| 18 | 7.284342 |
| 19 | 7.689027 |
| 20 | 8.093713 |
| Acres (acres) | Hectares (ha) |
|---|---|
| 21 | 8.498398 |
| 22 | 8.903084 |
| 23 | 9.30777 |
| 24 | 9.712455 |
| 25 | 10.117141 |
| 26 | 10.521827 |
| 27 | 10.926512 |
| 28 | 11.331198 |
| 29 | 11.735884 |
| 30 | 12.140569 |
| Acres (acres) | Hectares (ha) |
|---|---|
| 31 | 12.545255 |
| 32 | 12.949941 |
| 33 | 13.354626 |
| 34 | 13.759312 |
| 35 | 14.163997 |
| 36 | 14.568683 |
| 37 | 14.973369 |
| 38 | 15.378054 |
| 39 | 15.78274 |
| 40 | 16.187426 |
| Acres (acres) | Hectares (ha) |
|---|---|
| 41 | 16.592111 |
| 42 | 16.996797 |
| 43 | 17.401483 |
| 44 | 17.806168 |
| 45 | 18.210854 |
| 46 | 18.61554 |
| 47 | 19.020225 |
| 48 | 19.424911 |
| 49 | 19.829596 |
| 50 | 20.234282 |
| Acres (acres) | Hectares (ha) |
|---|---|
| 60 | 24.281139 |
| 70 | 28.327995 |
| 80 | 32.374851 |
| 90 | 36.421708 |
| 100 | 40.468564 |
Frequently asked questions
How many acres are in a hectare?
2.471054 acres — a hectare is the bigger unit.
How many square metres are in an acre?
4,046.8564224 m² exactly.
Which is bigger, an acre or a hectare?
A hectare — about 2.47 acres. If land is described in hectares, the number will be smaller than the same land in acres.