Pound-force per Square Foot to PSI Converter

Convert between psf and psi for structural engineering and pressure analysis

Pound-force per Square Foot (psf)

1 psf = 0.00694444 psi

Pounds per Square Inch (psi)

1 psi = 144 psf

Enter a value to see the conversion result

Engineering Pressure Reference

PSF	⇔	PSI
144 psf	⇔	1.0 psi
288 psf	⇔	2.0 psi
720 psf	⇔	5.0 psi
1,440 psf	⇔	10.0 psi
2,160 psf	⇔	15.0 psi
7,200 psf	⇔	50.0 psi

Structural Load Examples

Building Loads:
• Dead load (floor): 10-50 psf
• Live load (office): 50-80 psf
• Live load (storage): 125-250 psf
• Snow load: 20-50 psf

Wind Loads:
• Light wind: 10-20 psf
• Moderate wind: 20-40 psf
• High wind: 40-80 psf
• Hurricane force: 80-150 psf

Soil Pressures:
• Shallow foundation: 1,000-4,000 psf
• Deep foundation: 2,000-10,000 psf
• Basement wall: 300-1,000 psf
• Retaining wall: 500-2,000 psf

Pressure Units

PSF: Pounds per square foot
PSI: Pounds per square inch
Conversion: 1 psi = 144 psf
Area ratio: 1 ft² = 144 in²

Engineering Tips

PSF for large area loads
PSI for concentrated pressures
Consider load distribution
Factor of safety required

Applications

Civil: Structural design
HVAC: Air pressure systems
Geotechnical: Soil bearing capacity
Architecture: Load calculations