Convert Pound per Square Inch to Pound per Square Foot
Enter the number of psi that you want to convert to psf.
How to Convert PSI to PSF
The pound per square inch and pound per square foot are both units of pressure. 1 pound per square inch equals 144 psf. This means to convert psi to psf, you multiply by 144.
Formula
Step-by-Step Example
Convert 5 psi to psf:
We need to convert psi to psf
Since 1 psi = 144 psf, multiply by 144
5 × 144 = 720.00000001
5 psi = 720.00000001 psf
Pound per Square Inch to Pound per Square Foot Conversion Table
Quick reference table for common pound per square inch to pound per square foot conversions. Click any value for detailed calculation.
| PSI (psi) | PSF (psf) |
|---|---|
| 0.1 psi | 14.4 psf |
| 0.5 psi | 72.000000001 psf |
| 1 psi | 144 psf |
| 2 psi | 288 psf |
| 5 psi | 720.00000001 psf |
| 10 psi | 1440 psf |
| 25 psi | 3600 psf |
| 50 psi | 7200.0000001 psf |
| 100 psi | 14400 psf |
About These Units
Pound per Square Inch (psi)
Pounds per square inch (PSI or lbf/in²) is the standard pressure unit in the United States. PSI measures tire pressure (30-35 PSI for cars), air compressors, water pressure, and HVAC systems. One PSI equals approximately 6.895 kPa or 0.0689 bar.
Pound per Square Foot (psf)
Pounds per square foot (psf or lbf/ft²) measures structural loads, wind pressure, and floor loading in US construction. Building codes specify floor loads in psf (residential: 40 psf, commercial: 50-100 psf). One psf equals approximately 47.88 Pascals.
Frequently Asked Questions
How do I convert psi to psf?
To convert psi to psf, multiply the value by 144. For example, 10 psi = 1440 psf.
How many psf are in 1 pound per square inch?
1 pound per square inch equals 144 psf.
What is the formula for psi to psf?
The formula is: psf = psi × 144.