Convert Pounds per Square Foot to Pascals
Convert Pounds per Square Foot (lbf/ft²) to Pascals (Pa) instantly and accurately.
Conversion Formula
Pa = lbf/ft² × 47.88025898
About Pounds per Square Foot
One pound per square foot (psf) ≈ 47.88 Pa - the standard structural engineering load unit in US practice. Building codes specify design loads in psf: residential floors 40 psf; office buildings 50-80 psf; assembly areas 100+ psf; snow loads can exceed 100 psf. Wind pressure on building facades, soil bearing capacity for shallow foundations, and lateral earth pressure in retaining walls are all in psf. The related unit ksf (1,000 psf = 47.88 kPa) covers higher-capacity soils and deep foundations. 1 psf = 47.88 Pa.
About Pascals
The pascal (Pa) is the SI unit of pressure - 1 N/m², named after Blaise Pascal (1623-1662). Standard sea-level atmosphere ≈ 101,325 Pa. One pascal is very small: roughly the pressure of a single banknote lying flat. Pascal is simultaneously the SI unit for mechanical stress and elastic modulus: structural steel Young's modulus ~200 GPa; rubber shear modulus ~0.5 MPa. Used universally in fluid mechanics, acoustics, atmospheric science, and materials engineering. 1 Pa = 1 N/m².
Quick Reference Table
| Pounds per Square Foot (lbf/ft²) | Pascals (Pa) |
|---|---|
| 1 lbf/ft² | 47.8803 Pa |
| 2 lbf/ft² | 95.7605 Pa |
| 5 lbf/ft² | 239.401 Pa |
| 10 lbf/ft² | 478.803 Pa |
| 25 lbf/ft² | 1197.01 Pa |
| 50 lbf/ft² | 2394.01 Pa |
| 100 lbf/ft² | 4788.03 Pa |