Convert square feet to square inches
Square foot (ft²) to square inch (in²). One square foot equals 144 square inches.
Formula
Square foot to square inch conversion table
| Square feet | Square inches | Square inches | Square feet |
|---|---|---|---|
| 1 ft² | 144 in² | 1 in² | 0.006944 ft² |
| 2 ft² | 288 in² | 2 in² | 0.013889 ft² |
| 3 ft² | 432 in² | 3 in² | 0.020833 ft² |
| 5 ft² | 720 in² | 5 in² | 0.034722 ft² |
| 10 ft² | 1440 in² | 10 in² | 0.069444 ft² |
| 20 ft² | 2880 in² | 20 in² | 0.138889 ft² |
| 50 ft² | 7200 in² | 50 in² | 0.347222 ft² |
| 100 ft² | 14400 in² | 100 in² | 0.694444 ft² |
| 500 ft² | 72000 in² | 500 in² | 3.4722 ft² |
| 1000 ft² | 144000 in² | 1000 in² | 6.9444 ft² |
To convert square feet to square inches, multiply the number of square feet by 144. One square foot equals 144 square inches, and one square inch equals 0.006944 square feet, so the relationship is fixed and exact. As a worked example, 10 ft² comes to 1440 in². Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a area conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common square foot values already worked out in square inches, plus the reverse square inch to square foot direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many square inches are in a square foot?
One square foot equals 144 square inches. The ratio is constant, so you can multiply any number of square feet by 144 to get square inches.
What is the formula to convert square feet to square inches?
Use square inches = square feet × 144. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert square inches back to square feet?
Go the other way by using one square inch equals 0.006944 square feet. You can also press the swap button in the converter above to flip the direction in one click.
Is this square foot to square inch converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.