Convert acres to square meters
Convert acres to square meters instantly. 1 ac = 4,046.856422 m². Formula, worked examples and a quick reference table.
Last updated
One acre equals 4,046.856422 square meters. To convert any number of acres to square meters, multiply by 4,046.8564224.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Area conversions carry a trap that catches people who are perfectly comfortable with length: the factor is squared. There are 3.28 feet in a metre but 10.76 square feet in a square metre, and using the linear factor is the most common error in property arithmetic. Beyond that, land is measured in whatever the local convention prescribes — acres, hectares, and across South Asia bigha, katha and gaj — so the same plot is routinely described in two units that need reconciling.
acres to square meters formula
To go the other way, use acre = square meter ÷ 4,046.8564224.
About these units
An acre is 43,560 square feet, historically about the area one person could plough in a day with a yoke of oxen. It is still standard in US and UK land dealings.
The square metre is the standard unit of floor area worldwide, and the basis of both the hectare and the price-per-unit-area figures used in property.
Acre is also written acres. Square Meter is also written square metre, square metres, sq m, sqm, m2 and m^2.
Sources
acres to square meters conversion table
| Acre | Square Meter |
|---|---|
| 1 ac | 4,046.8564 m² |
| 2 ac | 8,093.7128 m² |
| 3 ac | 12,140.5693 m² |
| 5 ac | 20,234.2821 m² |
| 10 ac | 40,468.5642 m² |
| 20 ac | 80,937.1284 m² |
| 25 ac | 101,171.4106 m² |
| 50 ac | 202,342.8211 m² |
| 100 ac | 404,685.6422 m² |
| 250 ac | 1,011,714.1056 m² |
| 500 ac | 2,023,428.2112 m² |
| 1,000 ac | 4,046,856.4224 m² |
Frequently asked questions
How many square meters are in a acre? +
There are 4,046.856422 square meters in one acre.
What is 10 ac in m²? +
10 ac equals 40,468.5642 m². Multiply 10 by 4,046.8564224.
How do I convert square meter back to acre? +
Use acre = square meter ÷ 4,046.8564224. The converter above handles both directions, or see our dedicated square meters to acres page.
How accurate is this acre to square meter conversion? +
The factor used is 4,046.8564224, carried at full double precision. Where a unit has an exact legal definition the factor is exact rather than approximate. Rounding is applied only to the displayed result, so the answer is never a calculation done on an already-rounded number.
Is there a quick way to estimate ac to m² in my head? +
Multiply by 8094 and divide by 2. That approximates the true factor of 4,046.856422 exactly, which is close enough for a mental estimate.