Convert acres to hectares
1 ac = 0.40468564224 ha — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
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Show this value in all 25 area units
- Square kilometers km² 0.004 046 856 422 4
- Square hectometers hm² 0.404 685 642 24
- Square decameters dam² 40.468 564 224
- Square meters m² 4046.856 422 4
- Square decimeters dm² 404 685.642 24
- Square centimeters cm² 40 468 564.224
- Square millimeters mm² 4 046 856 422.4
- Square micrometers µm² 4 046 856 422 400 000
- Square nanometers nm² 4.0468564224e+21
- Hectares ha 0.404 685 642 24
- Ares a 40.468 564 224
- Decares daa 4.046 856 422 4
- Square inches in² 6 272 640
- Square feet ft² 43 560
- Square yards yd² 4840
- Square miles mi² 0.001 562 5
- Acres ac 1
- Roods ro 4
- Square rods rd² 160
- Sections section 0.001 562 5
- Townships twp 0.000 043 402 777 777 8
- Roofing squares sq 435.6
- Circular mils cmil 7 986 573 297 890
- Barns b 4.0468564224e+31
- Tsubos 坪 1224.174 067 78
Every row is Acre (ac) converted through the square meter, in exact rational arithmetic.
How to convert acres to hectares
Multiply the number of acres by 0.40468564224 to get hectares.
The exact factor is 0.40468564224 — as a fraction, 158080329/390625000.
Acre: Exactly 4840 square yards — historically a day of ploughing.
Hectare: The standard land-area unit almost everywhere outside the US.
Acre to Hectare conversion table
| Acres (ac) | Hectares (ha) |
|---|---|
| 1 ac | 0.404 685 64 |
| 2 ac | 0.809 371 28 |
| 3 ac | 1.214 056 9 |
| 5 ac | 2.023 428 2 |
| 10 ac | 4.046 856 4 |
| 20 ac | 8.093 712 8 |
| 25 ac | 10.117 141 |
| 50 ac | 20.234 282 |
| 100 ac | 40.468 564 |
| 250 ac | 101.171 41 |
| 500 ac | 202.342 82 |
| 1000 ac | 404.685 64 |
Hectare to Acre conversion table
| Hectares (ha) | Acres (ac) |
|---|---|
| 1 ha | 2.471 053 8 |
| 2 ha | 4.942 107 6 |
| 3 ha | 7.413 161 4 |
| 5 ha | 12.355 269 |
| 10 ha | 24.710 538 |
| 20 ha | 49.421 076 |
| 25 ha | 61.776 345 |
| 50 ha | 123.552 69 |
| 100 ha | 247.105 38 |
| 250 ha | 617.763 45 |
| 500 ha | 1235.5269 |
| 1000 ha | 2471.0538 |
Frequently asked
How many hectares are in a acre?
One acre equals 0.4046856422 hectares (ac → ha). That figure is exact, not rounded.
How do you convert acres to hectares?
Multiply the number of acres by 0.40468564224 to get hectares.
What is 1 ha in acres?
One hectare is 2.471053815 acres.
What is 10 ac in ha?
10 ac = 4.046 856 4 ha.
What exactly is a acre?
Exactly 4840 square yards — historically a day of ploughing.
What exactly is a hectare?
The standard land-area unit almost everywhere outside the US.