Acres to Hectares Converter
Type a value in acres to see it in hectares as you type, with the exact formula and a reference chart.
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How this was calculated
- 1 hectare = 2.471053815 acres
- 40 ÷ 2.471053815 = 16.187426 ha
| ac | ha |
|---|---|
| 0.25 ac | 0.101171 ha |
| 0.5 ac | 0.202343 ha |
| 1 ac | 0.404686 ha |
| 2 ac | 0.809371 ha |
| 5 ac | 2.02343 ha |
| 10 ac | 4.04686 ha |
| 20 ac | 8.09371 ha |
| 40 ac | 16.1874 ha |
| 50 ac | 20.2343 ha |
| 100 ac | 40.4686 ha |
| 160 ac | 64.7497 ha |
| 640 ac | 258.999 ha |
| 1,000 ac | 404.686 ha |
| ha | ac |
|---|---|
| 0.1 ha | 0.247105 ac |
| 0.25 ha | 0.617763 ac |
| 0.5 ha | 1.23553 ac |
| 1 ha | 2.47105 ac |
| 2 ha | 4.94211 ac |
| 5 ha | 12.3553 ac |
| 10 ha | 24.7105 ac |
| 20 ha | 49.4211 ac |
| 25 ha | 61.7763 ac |
| 50 ha | 123.553 ac |
| 100 ha | 247.105 ac |
| 500 ha | 1,235.53 ac |
How to convert acres to hectares
1 acre = 0.4046856422 hectares. To convert acres to hectares, divide by 2.471053815 (or multiply by 0.4046856422). An acre is 43,560 square feet, about 4,046.86 m². A hectare is 10,000 m², a 100 m × 100 m square.
Worked examples
- 1 acre = 0.404686 ha (1 ÷ 2.4710538)
- 40 acres = 16.1874 ha (40 ÷ 2.4710538)
- 640 acres = 258.999 ha (640 ÷ 2.4710538)
Where this conversion comes up
Acres are used for land, farm and lot sizes in the US and UK; hectares for farmland and forest area in most countries. One acre is 0.4047 ha. A US quarter section (160 acres) is 64.75 ha, and a square mile (640 acres) is 259 ha.
Quick estimate
Multiply by 0.4 (1.2% low).
Common mistakes
- Multiplying instead of dividing. A hectare is larger than a acre, so the number of hectares must come out smaller: 1 acre = 0.404686 ha.
- Rounding too early. Keep the full factor until the last step; rounding 0.405 to 0.4 first puts large values noticeably off.
Going the other way? Use the hectares to acres converter. Related area converters: acres to square feet, square feet to square meters, square meters to square feet, square feet to acres, square inches to square feet, square feet to square yards.
Frequently asked questions
How do you convert acres to hectares?
Multiply the acres by 0.4046856422 (or divide by 2.471053815). For example, 40 acres is 16.1874 hectares.
How many hectares are in one acre?
One acre is 0.4046856422 hectares. An acre is 43,560 square feet, about 4,046.86 m².
What is 640 acres in hectares?
640 acres is 258.999 hectares.
Is there a quick way to estimate acres to hectares?
Multiply by 0.4 (1.2% low).