Convert Acres to Square Meters (ac to m2)
1 acre (ac) = 4046.856422 square meters (m²). 1 m² = 0.0002471053815 ac. Example: 15 ac = 15 × 4046.856422 = 60702.84634 m².
Also searched as acres to m2, acres in m2, acres into square meters, ac to m2, ac in square meters, ac into square meter, acre to square meter, ac to square meters converter, acres to square metres and how many square meters in an acre.
1 ac = 4046.856422 m²
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk acre to square meter converter to paste a column from Excel.
How to Convert Acre to Square Meter
- 1 ac = 4046.856422 m²
- 1 m² = 0.0002471053815 ac
- Example: convert 15 ac to m²: 15 ac = 15 × 4046.856422 m² = 60702.84634 m²
Formula
m² = ac × 4046.8564224
Derivation from SI units:
- 1 acre = 43 560 ft² = 4 046.856 422 4 m² (international foot; the US survey foot was retired at the end of 2022)
- 1 m² = 1 m × 1 m
Both units are defined exactly, so the factor is exact. Acre definition: acre; Square Meter definition: square meter.
Worked examples
- A reading of 2 ac converts to 8093.712845 m².
2 ac × 4046.856422 = 8093.712845 m² - A value of 20 ac is 80937.12845 m².
20 ac × 4046.856422 = 80937.12845 m²
Acre to Square Meter conversion table
| Acres (ac) | Square Meters (m²) |
|---|---|
| 0.1 ac | 404.6856422 m² |
| 0.25 ac | 1011.714106 m² |
| 0.5 ac | 2023.428211 m² |
| 1 ac | 4046.856422 m² |
| 2 ac | 8093.712845 m² |
| 2.47105 ac | 9999.984563 m² |
| 5 ac | 20234.28211 m² |
| 10 ac | 40468.56422 m² |
| 20 ac | 80937.12845 m² |
| 40 ac | 161874.2569 m² |
| 100 ac | 404685.6422 m² |
| 160 ac | 647497.0276 m² |
| 640 ac | 2589988.11 m² |
Where it's used
Acres are used for US, UK and Indian land and property listings, while square meters appear in floor and room areas. Both measure area, so the conversion is a fixed factor.
Acre to other area units
| Conversion | 1 ac equals |
|---|---|
| acre to square meter | 4046.856422 m² |
| acre to square centimeter | 40468564.22 cm² |
| acre to square foot | 43560 ft² |
| acre to square inch | 6272640 in² |
| acre to hectare | 0.4046856422 ha |
| acre to square millimeter | 4046856422 mm² |
| acre to square kilometre | 0.004046856422 km² |
| acre to square yard | 4840 yd² |
Show 1 more units
| acre to square mile | 0.0015625 mi² |
|---|
Frequently asked questions
How many square meters are in 1 acre?
1 ac = 4046.856422 m².
How do I convert acres to square meters?
Multiply the value in ac by 4046.856422. For example, 15 ac × 4046.856422 = 60702.84634 m².
Is the ac to m² conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- NIST Handbook 44, Appendix C: General Tables of Units of Measurement, National Institute of Standards and Technology , Appendix C, units of area.
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2, coherent derived units.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Acres to Square Meters (ac to m2). Retrieved October 25, 2026, from https://scientificconverters.com/area/acres-to-square-meters/
IEEE
Scientific Converters, "Convert Acres to Square Meters (ac to m2)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/area/acres-to-square-meters/