Acres to Hectares Converter
One international acre equals exactly 0.40468564224 hectares. Use this converter when a farm listing, land deed, planning note or overseas property brochure gives acreage and you need the hectare value, or switch direction when the source area is already in ha.
How to convert acres to hectares
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1
Enter the area in acres
Type any whole or decimal acre value, such as 0.5, 2.75 or 160.
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2
Read the hectare result
The tool multiplies by 0.40468564224 and displays the result at a useful precision for land and property work.
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3
Use the reverse conversion when needed
For a hectare value, use 1 ha = 2.4710538147 acres to compare both unit systems.
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4
Copy the value into your notes
Use the result in a listing draft, valuation sheet, planning file or farm-management note.
Exact conversion
An international acre is 43,560 square feet, based on the international foot. A hectare is exactly 10,000 m². That gives the exact relationship:
1 acre = 4,046.8564224 m² = 0.40468564224 ha
1 ha = 2.4710538147 acres
The older U.S. survey acre comes from the legacy U.S. survey foot. It is slightly larger, but that unit was deprecated for new U.S. federal surveying work after 2022 and usually matters only when interpreting legacy survey records.
Quick reference
| Acres | Hectares | Useful context |
|---|---|---|
| 0.25 | 0.101 | Large suburban lot |
| 1 | 0.405 | Smallholding, paddock or large garden |
| 2.5 | 1.012 | Nearly one hectare |
| 5 | 2.023 | Small hobby farm |
| 10 | 4.047 | Compact rural holding |
| 40 | 16.187 | Quarter-quarter section in U.S. land descriptions |
| 160 | 64.750 | Quarter section or classic homestead parcel |
| 640 | 258.999 | One square mile, also one U.S. section |
Where the units appear
- Acres are still common in the United States, the United Kingdom, Ireland, parts of the Commonwealth and older property records.
- Hectares are the standard land-area unit in most metric markets, including European agricultural files, land registries across Asia, and many African and Latin American property records.
Avoid the common square-metre mistake
One hectare is 10,000 m², not 1,000 m². A 10,000 m² parcel is 1 ha, while 10,000 ha is 100 km², closer to the land area of a small city than a single estate lot.
Frequently Asked Questions
Exactly 2.4710538147 acres. For quick mental maths, 2.5 acres is very close to 1 hectare.
Multiply acres by 0.40468564224. To go from hectares back to acres, multiply hectares by 2.4710538147.
Yes, but only very slightly. The international acre is 4,046.8564224 m², while the legacy U.S. survey acre is about 4,046.87261 m². For ordinary property listings the difference is negligible; for official surveys, follow the unit named in the record.
It is roughly a square 63.6 m on each side, or a little smaller than an American football field without the end zones.
Neither. Acres and hectares are land-area units. For buildings, use square metres, square feet or another floor-area unit required by the market.
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