How to convert acres to square metres
One acre equals 4,046.86 square metres, so multiply the number of acres by 4,046.86:
m² = ac × 4,046.86
ac = m² ÷ 4,046.86 (1 m² = 0.000247 ac)
Example: 0.25 ac → 0.25 × 4,046.86 = 1,011.71 m².
Going the other way, divide by 4,046.86, or multiply by 0.000247; the square metres to acres converter does it for you.
Everyday values
| Acres | Square metres | For example |
|---|---|---|
| 0.25 ac | 1,011.71 m² | a large suburban lot |
| 0.5 ac | 2,023.43 m² | half an acre |
| 1 ac | 4,046.86 m² | one acre |
| 2 ac | 8,093.71 m² | two acres |
When you need this conversion
One acre is 4,046.86 m², roughly the area of 0.57 football (soccer) pitches. Property listings in the US and UK often give land in acres and floor space in square feet.
Acre to square metre conversion table
| ac | m² | ac | m² |
|---|---|---|---|
| 0.25 ac | 1,011.71 m² | 2.75 ac | 11,128.9 m² |
| 0.5 ac | 2,023.43 m² | 3 ac | 12,140.6 m² |
| 0.75 ac | 3,035.14 m² | 3.25 ac | 13,152.3 m² |
| 1 ac | 4,046.86 m² | 3.5 ac | 14,164 m² |
| 1.25 ac | 5,058.57 m² | 3.75 ac | 15,175.7 m² |
| 1.5 ac | 6,070.28 m² | 4 ac | 16,187.4 m² |
| 1.75 ac | 7,082 m² | 4.25 ac | 17,199.1 m² |
| 2 ac | 8,093.71 m² | 4.5 ac | 18,210.9 m² |
| 2.25 ac | 9,105.43 m² | 4.75 ac | 19,222.6 m² |
| 2.5 ac | 10,117.1 m² | 5 ac | 20,234.3 m² |
About the units
- Acre (ac): 43,560 square feet, about 4,046.86 m².
- Square metre (m²): the area of a square 1 metre on each side.
Both are units of area. The conversion factor comes from the exact definitions above, so the calculator is exact; results are only rounded for display (up to six significant digits).
Frequently asked questions
How many square metres are in one acre?
One acre is 4,046.86 square metres. One square metre is 0.000247 acres.
How do I convert acres to square metres?
Multiply the value in acres by 4,046.86. To go back, divide by 4,046.86.
What is 0.25 ac in square metres?
0.25 ac = 1,011.71 m².
What is 0.5 ac in square metres?
0.5 ac = 2,023.43 m².
Sources
- NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI), Appendix B: conversion factors.
- NIST Handbook 44 (2024), Appendix C: General tables of units of measurement.
Last reviewed 5 October 2026. Results are estimates; see our disclaimer.