Square Inches to Square Feet
A square inch measures a 1 inch by 1 inch square, used for screen area and small parts in the US. The square foot is used throughout the US and UK to describe the floor area of homes and offices. 1 in² equals ≈0.00694444 ft², 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
ft² = in² × ≈0.00694444
in² = ft² × 144
Worked example: 5 in² × ≈0.00694444 = ≈0.0347222 ft².
Conversion table
| Square Inch (in²) | Square Foot (ft²) |
|---|---|
| 1 in² | ≈0.00694444 ft² |
| 2 in² | ≈0.0138889 ft² |
| 3 in² | ≈0.0208333 ft² |
| 5 in² | ≈0.0347222 ft² |
| 10 in² | ≈0.0694444 ft² |
| 20 in² | ≈0.138889 ft² |
| 25 in² | ≈0.173611 ft² |
| 50 in² | ≈0.347222 ft² |
| 100 in² | ≈0.694444 ft² |
| 250 in² | ≈1.73611 ft² |
| 500 in² | ≈3.47222 ft² |
| 1,000 in² | ≈6.94444 ft² |
Frequently asked
- How many Square Feet in a square inch?
- 1 in² equals ≈0.00694444 ft².
- How do I convert Square Inches to Square Feet?
- Multiply the value in in² by ≈0.00694444 to get ft². The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Square Inch and Square Foot 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.