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Square meters to Acres (m² to acre)
Convert square meters to acres: 1 m² = 0.000247105 acre. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 m² = 0.000247105 acre
acres = square meters × 0.0002471053815 — reverse: square meters = acres × 4046.856422
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 m² = 0.00123553 acre
- 12.5 m² = 0.00308882 acre
- 100 m² = 0.0247105 acre
Square meters to acres conversion table
| Square meters (m²) | Acres (acre) |
|---|---|
| 1 | 0.000247105 |
| 2 | 0.000494211 |
| 3 | 0.000741316 |
| 4 | 0.000988422 |
| 5 | 0.00123553 |
| 6 | 0.00148263 |
| 7 | 0.00172974 |
| 8 | 0.00197684 |
| 9 | 0.00222395 |
| 10 | 0.00247105 |
| 15 | 0.00370658 |
| 20 | 0.00494211 |
| 25 | 0.00617763 |
| 30 | 0.00741316 |
| 40 | 0.00988422 |
| 50 | 0.0123553 |
| 75 | 0.0185329 |
| 100 | 0.0247105 |
| 200 | 0.0494211 |
| 250 | 0.0617763 |
| 500 | 0.123553 |
| 1000 | 0.247105 |
FAQ
How many acres are in one square meter?
1 m² = 0.000247105 acre. 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 square meters to acres?
Multiply the value in square meters by 0.0002471053815: acres = square meters × 0.0002471053815. For example, 5 m² = 0.00123553 acre.
How do I convert acres back to square meters?
Multiply by the inverse factor 4046.856422 (square meters = acres × 4046.856422), or use the acres-to-square meters page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=m2&to_unit=acre - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"m2","to_unit":"acre"} - Markdown: https://tttkmbb.com/conversion/square-meters-to-acres.md · JSON: https://tttkmbb.com/conversion/square-meters-to-acres.json (add
?value=for a result) · Units: /api/v1/units?quantity=area - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.