Area Converter
Convert square feet, square yards, acres and square miles to square meters, hectares and square kilometers, and back.
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- Result
- Formula
- Reverse
- Exact?
In Every Unit
| Unit | Value |
|---|
Saved Conversions
Conversions you add are saved in this browser.
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How to Convert Area Units
Area factors are the length factors squared: a foot is 0.3048 m, so a square foot is 0.3048² = 0.09290304 m². An acre is 43,560 square feet.
m² = ft² × 0.09290304 ha = ac × 0.40468564224
Worked Example
Common Conversions
| From | Equals |
|---|---|
| 1 ft² | 0.09290304 m² |
| 1 m² | 10.76391 ft² |
| 1 ac | 0.4046856 ha |
| 1 ha | 2.471054 ac |
| 1 ac | 43,560 ft² |
| 1 yd² | 0.8361274 m² |
| 1 mi² | 2.589988 km² |
Unit Definitions
| Unit | Equals | Exact? |
|---|---|---|
| Square millimeters (mm²) | 0.000001 m² | Exact |
| Square centimeters (cm²) | 0.0001 m² | Exact |
| Square meters (m²) | 1 m² | Exact |
| Hectares (ha) | 10,000 m² | Exact |
| Square kilometers (km²) | 1,000,000 m² | Exact |
| Square inches (in²) | 0.00064516 m² | Exact |
| Square feet (ft²) | 0.09290304 m² | Exact |
| Square yards (yd²) | 0.83612736 m² | Exact |
| Acres (ac) | 4,046.856422 m² | Exact |
| Square miles (mi²) | 2,589,988.10999999987 m² | Exact |
| Roofing squares (100 ft²) (sq) | 9.290304 m² | Exact |
Factors follow NIST Special Publication 811, Appendix B. "Exact" means the unit is defined as that value; results are rounded only for display.
Tips
A hectare is 10,000 m², about 2.47 acres. One square mile is 640 acres. Roofers sell by the square, 100 ft².