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Area
Square inches to Square feet
Convert square inches (in²) to square feet (ft²). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 in² = 0.006944 ft²
Square inches to Square feet Conversion Table
Common values, ready to copy:
| square inches | square feet |
|---|---|
| 1 in² | 0.006944 ft² |
| 2 in² | 0.013889 ft² |
| 5 in² | 0.034722 ft² |
| 10 in² | 0.069444 ft² |
| 25 in² | 0.173611 ft² |
| 50 in² | 0.347222 ft² |
| 100 in² | 0.694445 ft² |
| 1,000 in² | 6.9444 ft² |
Formula
square feet = square inches × 6.94444743e-3
Area conversions are derived from length: 1 ft² = (0.3048 m)² = 0.092903 m². 1 acre = 4,046.86 m². 1 hectare = 10,000 m² exactly.
About Square inches and Square feet
Square inches (in²): One inch squared, or 6.4516 cm² exactly (since the inch is defined as 2.54 cm exactly). Common uses: Small flat areas in US contexts — phone screens, computer chip die sizes, postal stamps, and small fabricated parts.
Square feet (ft²): One foot squared, or 0.092903 m²; the dominant area unit in US real estate. Common uses: Home and apartment sizing in the United States, commercial real estate, lawn areas, and US construction blueprints.
How the conversion works
Area conversions are derived from length: 1 ft² = (0.3048 m)² = 0.092903 m². 1 acre = 4,046.86 m². 1 hectare = 10,000 m² exactly.
The exact relationship is square feet = square inches × 6.94444743e-3, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between square inches and square feet comes up wherever area measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.