How many square inches are in one square foot?
One square foot contains exactly 144 square inches.
Convert Square foot (ft²) to Square inch (in²) instantly.
Calculation
value × 144
| Quick Conversion | Converted |
|---|---|
| 1 ft² | 144 in² |
| 5 ft² | 720 in² |
| 10 ft² | 1,440 in² |
| 100 ft² | 14,400 in² |
| 1,000 ft² | 144,000 in² |
A square foot is a customary area unit equal to a square one foot on each side.
Square feet are widely used in real estate, construction, interiors, and surface measurement.
ft2 is used for rooms, panels, floors, roofs, lots, building footprints, and site areas.
A square inch is a customary area unit equal to a square one inch on each side.
Square inches are used for small surfaces, technical parts, labels, and product faces.
in2 is used for labels, screens, cutouts, small parts, craft pieces, and detailed surface checks.
Mathematically, square inch (in²) = square foot (ft²) converted with the formula below.
1 ft² = 144 in²
1 in² = 0.006944 ft²
Formula: value × 144
Example: 15 ft² = 2,160 in²
Precision note: The ft2 to in2 factor is exact. For physical layouts, round according to cutting, printing, or manufacturing tolerance.
1 ft² = 144 in²
1 in² = 0.006944 ft²
| Square foot [ft²] | Square inch [in²] |
|---|---|
| 0.01 ft² | 1.44 in² |
| 0.1 ft² | 14.4 in² |
| 1 ft² | 144 in² |
| 2 ft² | 288 in² |
| 5 ft² | 720 in² |
| 10 ft² | 1,440 in² |
| 20 ft² | 2,880 in² |
| 50 ft² | 7,200 in² |
| 100 ft² | 14,400 in² |
One square foot contains exactly 144 square inches.
One foot is 12 inches, and area uses both dimensions. 12 × 12 equals 144 square inches.
Use in2 for smaller surfaces, cutouts, labels, product faces, or detailed layout. Use ft2 for rooms, panels, and larger surfaces.