Square Feet to Square Inches Converter
1 square foot = 144 square inches
1 square foot equals 144 square inches
How to convert square feet to square inches
Area factors are squared length factors: 1 ft² = (0.3048 m)². The acre here uses international feet; historic US survey acres differ slightly.
in² = ft² × 144One square foot is 144 square inches, so a single multiplication converts any value.
1,440 in² = 10 × 144Square feet to square inches conversion table
Common values in square feet, converted to square inches.
| Square feet (ft²) | Square inches (in²) |
|---|---|
| 1 | 144 |
| 2 | 288 |
| 3 | 432 |
| 4 | 576 |
| 5 | 720 |
| 10 | 1,440 |
| 20 | 2,880 |
| 25 | 3,600 |
| 50 | 7,200 |
| 100 | 14,400 |
| 250 | 36,000 |
| 500 | 72,000 |
| 1,000 | 144,000 |
About these units
square footft²
The area of a square one foot on each side. The standard unit for US floor area.
square inchin²
The area of a square one inch on each side: exactly 6.4516 cm².
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.