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Acres to Square meters (acre to m²)
Convert acres to square meters: 1 acre = 4046.86 m². Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 acre = 4046.86 m²
square meters = acres × 4046.856422 — reverse: acres = square meters × 0.0002471053815
The factor is derived from the SI definitions of both units (base unit: m2) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 acre = 20234.3 m²
- 12.5 acre = 50585.7 m²
- 100 acre = 404686 m²
Acres to square meters conversion table
| Acres (acre) | Square meters (m²) |
|---|---|
| 1 | 4046.86 |
| 2 | 8093.71 |
| 3 | 12140.6 |
| 4 | 16187.4 |
| 5 | 20234.3 |
| 6 | 24281.1 |
| 7 | 28328 |
| 8 | 32374.9 |
| 9 | 36421.7 |
| 10 | 40468.6 |
| 15 | 60702.8 |
| 20 | 80937.1 |
| 25 | 101171 |
| 30 | 121406 |
| 40 | 161874 |
| 50 | 202343 |
| 75 | 303514 |
| 100 | 404686 |
| 200 | 809371 |
| 250 | 1011710 |
| 500 | 2023430 |
| 1000 | 4046860 |
FAQ
How many square meters are in one acre?
1 acre = 4046.86 m². The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert acres to square meters?
Multiply the value in acres by 4046.856422: square meters = acres × 4046.856422. For example, 5 acre = 20234.3 m².
How do I convert square meters back to acres?
Multiply by the inverse factor 0.0002471053815 (acres = square meters × 0.0002471053815), or use the square meters-to-acres page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=acre&to_unit=m2 - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"acre","to_unit":"m2"} - Markdown: https://tttkmbb.com/conversion/acres-to-square-meters.md · JSON: https://tttkmbb.com/conversion/acres-to-square-meters.json (add
?value=for a result) · Units: /api/v1/units?quantity=area - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.