About the m² to ac calculation
One square meter is exactly 0.00024711 acres, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The standard unit for floor area in metric countries. The standard land unit in the US and UK — originally the area one ox team could plough in a day.
Formula
ac = m² × 0.00024711
1 m² = 0.00024711 ac
1 ac = 4,046.86 m²Worked example
To convert 100 m², multiply by 0.00024711: 100 × 0.00024711 = 0.024711 ac.
Frequently asked questions
How many acres are in a square meter?
There are 0.00024711 acres in one square meter. To convert any amount, multiply the number of square meters by 0.00024711.
How do I convert acres back to square meters?
Divide instead of multiplying, or equivalently multiply by 4,046.86. One acre is 4,046.86 square meters.
Is this conversion exact?
Yes. Since the international agreement of 1959, the relationship between square meters and acres is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.
Where is each of these units used?
Square Meters: the standard unit for floor area in metric countries. Acres: the standard land unit in the US and UK — originally the area one ox team could plough in a day.
Sources
- NIST Special Publication 811 — Guide for the Use of the International System of Units