How this conversion works
Area units are squares of length units, so their factors are the length factor multiplied by itself. Because a foot is exactly 0.3048 m, a square foot is exactly 0.3048² = 0.09290304 m².
The converter expresses your value in square meters and then divides by the size of the target unit. Acres and hectares are land-measurement units: one hectare is a 100 m × 100 m square, and one acre is 43,560 square feet.
Formula: result = value × (base units per source unit) ÷ (base units per target unit)
Where this conversion is used
- Comparing home or apartment sizes listed in square feet and square meters.
- Land and farm sizes in acres and hectares.
- Ordering flooring, turf or roofing sold by a different area unit.
- Reading plot plans and property listings from other countries.
Worked example: 2,400 ft² to square meters
- One square foot is 0.09290304 m².
- 2,400 × 0.09290304 = 222.967296 m².
- Rounded: about 222.97 m².
Unit definitions
| Unit | In square meters | Note |
|---|---|---|
| Square meter (m²) | 1 | |
| Square kilometer (km²) | 1,000,000 | |
| Square centimeter (cm²) | 0.0001 | |
| Square millimeter (mm²) | 0.000001 | |
| Hectare (ha) | 10,000 | 10,000 m² exactly. |
| Acre (ac) | 4,046.8564224 | International acre = 43,560 ft² exactly. |
| Square mile (mi²) | 2,589,988.11034 | |
| Square yard (yd²) | 0.83612736 | |
| Square foot (ft²) | 0.09290304 | |
| Square inch (in²) | 0.00064516 |
Square feet to square meters
| Square foot (ft²) | Square meter (m²) |
|---|---|
| 1 | 0.0929 |
| 10 | 0.929 |
| 100 | 9.2903 |
| 500 | 46.4515 |
| 1,000 | 92.903 |
| 1,500 | 139.3546 |
| 2,000 | 185.8061 |
| 2,500 | 232.2576 |
| 5,000 | 464.5152 |
Acres to hectares
| Acre (ac) | Hectare (ha) |
|---|---|
| 0.25 | 0.1012 |
| 0.5 | 0.2023 |
| 1 | 0.4047 |
| 2 | 0.8094 |
| 5 | 2.0234 |
| 10 | 4.0469 |
| 40 | 16.1874 |
| 100 | 40.4686 |
| 640 | 258.9988 |
Things to watch for
- Do not convert square units with a length factor: 1 m = 3.28 ft, but 1 m² = 10.76 ft².
- A square mile is exactly 640 acres.
Precision and sources
Results are calculated from the definitions above and rounded to 12 significant digits; the converter shows up to eight decimal places and the tables four. Reference: NIST Special Publication 811, Guide for the Use of the International System of Units, Appendix B.
Frequently asked questions
How many square feet are in a square meter?
About 10.7639 square feet. The exact relationship is 1 ft² = 0.09290304 m².
How big is an acre?
An acre is 43,560 ft², or about 4,046.86 m², roughly 0.405 hectares. A football field without end zones is about 1.1 acres.
What is the difference between an acre and a hectare?
A hectare is 10,000 m², about 2.471 acres. Hectares are used with metric measurements and acres in the US and UK.