Convert Square Foot to Square Inch
Use this free converter to change square feet (ft²) into square inches (in²). Square foot and square inch both measure area. As a quick reference, 1 ft² equals 144 in², and 1 in² equals 0.0069444444 ft².
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Square Inch (in²)
144
1 ft² = 144 in²
Area conversion table
| Square Foot | Square Inch |
|---|---|
| 0.01 | 1.44 |
| 0.1 | 14.4 |
| 0.5 | 72 |
| 1 | 144 |
| 2 | 288 |
| 3 | 432 |
| 5 | 720 |
| 10 | 1440 |
| 20 | 2880 |
| 25 | 3600 |
| 50 | 7200 |
| 100 | 14400 |
| 1,000 | 144000 |
How to convert Square Foot to Square Inch
Multiply the square foot value by 144 to get square inches.
- Enter the number of square feet you want to convert.
- The converter instantly shows the equivalent value in square inches.
- Worked example: 15 ft² × 144 = 2160 in².
- Use the swap button to reverse the conversion (square inch to square foot).
About these units
Square Foot (ft²)
- Definition
- A square foot (ft²) is the area of a square one foot on each side, about 0.093 square meters.
- History
- It derives from the foot and is deeply embedded in US and UK property practice.
- Current use
- Square feet are the standard unit for real-estate floor area in the US and UK.
Square Inch (in²)
- Definition
- A square inch (in²) is the area of a square one inch on each side, exactly 6.4516 square centimeters.
- History
- It follows from the inch in the imperial system.
- Current use
- Square inches measure small areas such as print, screens, and material samples.
Frequently asked questions
How many square inches are in a square foot?
There are 144 in² in 1 ft². To convert, multiply the number of square feet by 144.
How do I convert square feet to square inches?
Multiply the square foot value by 144 to get square inches. For example, 10 ft² = 1440 in².
Is this square foot-to-square inch converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Square Foot to other area units
| Unit | 1 Square Foot equals |
|---|---|
| Square Meter (m²) | 0.09290304 m² |
| Square Kilometer (km²) | 9.2903e-8 km² |
| Square Centimeter (cm²) | 929.0304 cm² |
| Square Mile (mi²) | 3.5870e-8 mi² |
| Square Yard (yd²) | 0.11111111 yd² |
| Square Inch (in²) | 144 in² |
| Acre (ac) | 0.000022956841 ac |
| Hectare (ha) | 0.000009290304 ha |