Acre to Square Meter Converter (ac to m²)
1 acre equals 4,046.856422 square meters — multiply the number of acres by 4,046.856422 to convert. This factor is the metric definition of the acre and is used worldwide to bridge imperial land units and the metric system.
The formula
To convert acres to square meters, multiply by 4,046.856422:
square meters = acres × 4046.856422
For example, 10 ac × 4046.856422 = 40,468.56422 m². To reverse it, divide by 4,046.856422 (or multiply by 0.00024711).
Conversion table
| Acres (ac) | Square meters (m²) |
|---|---|
| 1 | 4,046.856422 |
| 2 | 8,093.712844 |
| 3 | 12,140.569266 |
| 5 | 20,234.28211 |
| 10 | 40,468.56422 |
| 25 | 101,171.41055 |
| 50 | 202,342.8211 |
| 100 | 404,685.6422 |
| 500 | 2,023,428.211 |
| 1000 | 4,046,856.422 |
How to convert online
- Type the number of acres into the first box.
- Read the square-meter value instantly in the second box.
- Enter an m² value to convert back to acres — it works both ways.
Use the Acre to Square Meter Converter — free and instant in your browser.
Where this conversion is used
Square meters are the everyday metric unit for land and floor area, so converting from acres is common when reviewing property deeds, planning applications and agricultural records in metric countries. Architects and surveyors also use it to reconcile imperial site data with metric drawings.
FAQ
How many square meters are in an acre?
One acre equals 4,046.856422 m². So 2 acres is 8,093.712844 m² and 100 acres is 404,685.6422 m².
How do I convert square meters back to acres?
Divide by 4,046.856422, or multiply by 0.00024711. So 10,000 m² is about 2.471 acres.
Is the conversion exact?
Yes — one acre is exactly 4046.8564224 m² by definition; the tool uses 4046.856422 for display precision.
Is this converter free and private?
Yes. It runs entirely in your browser — nothing is uploaded or stored. It is free, needs no sign-up and works offline once loaded.
Related converters
- Square Meter to Acre Converter
- Acre to Square Foot Converter
- Acre to Square Kilometer Converter
- Acre to Hectare Converter
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