Square Feet to Square Inches
The square foot is used throughout the US and UK to describe the floor area of homes and offices. A square inch measures a 1 inch by 1 inch square, used for screen area and small parts in the US. 1 ft² equals 144 in², so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to area, measured here against area's base unit (m²) — every other area unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
in² = ft² × 144
ft² = in² × ≈0.00694444
Worked example: 5 ft² × 144 = 720 in².
Conversion table
| Square Foot (ft²) | Square Inch (in²) |
|---|---|
| 1 ft² | 144 in² |
| 2 ft² | 288 in² |
| 3 ft² | 432 in² |
| 5 ft² | 720 in² |
| 10 ft² | 1,440 in² |
| 20 ft² | 2,880 in² |
| 25 ft² | 3,600 in² |
| 50 ft² | 7,200 in² |
| 100 ft² | 14,400 in² |
| 250 ft² | 36,000 in² |
| 500 ft² | 72,000 in² |
| 1,000 ft² | 144,000 in² |
Frequently asked
- How many Square Inches in a square foot?
- 1 ft² equals 144 in².
- How do I convert Square Feet to Square Inches?
- Multiply the value in ft² by 144 to get in². The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Square Foot and Square Inch are both defined by a fixed conversion factor to area's base unit (m²), so the result shown is exact to the precision displayed, not an approximation.