Area / in² → ft²
Convert Square inches to Square feet
Convert surface areas in metric and international customary units. Convert Square inches (in²) to Square feet (ft²). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Square feet to Square inches →
How to convert square inches to square feet
Area factors are squared length factors. Acres here use international feet, not historical US survey feet.
Use x for the value in in², b for the intermediate value in m², and y for the result in ft².
ft² = in² × 0.00064516 ÷ 0.09290304
Worked examples
10 in² ≈ 0.0694444444444 ft²
Step 1: (10 × 0.00064516) ≈ 0.0064516 m².
Step 2: 0.0064516 ÷ 0.09290304 ≈ 0.0694444444444 ft².20 in² ≈ 0.138888888889 ft²
Step 1: (20 × 0.00064516) ≈ 0.0129032 m².
Step 2: 0.0129032 ÷ 0.09290304 ≈ 0.138888888889 ft².
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Square inches
Square inches (in²) measures area under the conventions above. The base value in m² is (x × 0.00064516), where x is the numerical value in in². Factors shown here are rounded for display; calculations use the stored factor.
About Square feet
Square feet (ft²) measures area under the conventions above. The base value in m² is (x × 0.09290304), where x is the numerical value in ft². Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Keep these unit conventions consistent when using measurements in construction calculations.
Square inches to square feet reference table
| Square inches (in²) | Square feet (ft²) |
|---|---|
| 1 | 0.00694444444444 |
| 5 | 0.0347222222222 |
| 10 | 0.0694444444444 |
| 25 | 0.173611111111 |
| 50 | 0.347222222222 |
| 100 | 0.694444444444 |
| 1000 | 6.94444444444 |
Browse every area conversion →