About This Calculator
This calculator converts pressure between pounds per square inch (psi) and pounds per square foot (psf) using the exact ratio 1 psi = 144 psf. It is useful in industrial, structural, and mechanical systems.
How It Works
- Select the direction: PSI to PSF or PSF to PSI.
- Enter the pressure value to convert.
- The result is calculated using the following formulas:
PSF = PSI × 144
PSI = PSF ÷ 144
PSI and PSF Conversion Table
| PSI | PSF |
|---|---|
| 0.1 psi | 14.4 psf |
| 0.5 psi | 72.0 psf |
| 1 psi | 144.0 psf |
| 2 psi | 288.0 psf |
| 5 psi | 720.0 psf |
| 10 psi | 1440.0 psf |
Frequently Asked Questions
Why is 1 psi equal to 144 psf?
Because there are 144 square inches in a square foot (12 × 12), so pressure per square inch must be multiplied by 144 to convert to per square foot.
Can this calculator convert both directions?
Yes. It supports bidirectional conversion between psi and psf.
Is it suitable for engineering use?
Yes. It is accurate and based on the standard unit definitions used in industrial applications.