Square feet to Square inches
Convert square feet to square inches (ft² to in²). 1 ft² = 144 in². Use the calculator, formula and conversion table.
How to convert square feet to square inches
Multiply the amount in square feet by 144 to get square inches. The displayed factor and results are rounded to 12 significant digits.
in² = ft² × 144Worked example
1 ft² = 144 in². Change the amount in the calculator above to use your own value.
Units and assumptions
Area uses squared length factors: one square foot is exactly 0.09290304 square metres. Acres are international acres; hectares equal 10,000 square metres.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Square feet to Square inches table
| Square feet (ft²) | Square inches (in²) |
|---|---|
| 0 | 0 |
| 1 | 144 |
| 5 | 720 |
| 10 | 1,440 |
| 25 | 3,600 |
| 100 | 14,400 |
| 1,000 | 144,000 |
About this conversion
What is the formula for square feet to square inches?
in² = ft² × 144. Multiply the amount in square feet by 144 to get square inches. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to square feet?
Use the square inches to square feet calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the area converter to browse all supported pairs.