Convert Pounds per Square Foot to Megapascals
Convert Pounds per Square Foot (lbf/ft²) to Megapascals (MPa) instantly and accurately.
Conversion Formula
MPa = lbf/ft² × 4.788025898e-5
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 Megapascals
A megapascal (MPa) = 10⁶ Pa = 10 bar - standard unit for mechanical stress, material strength, and high-pressure engineering. Structural material yield strengths: mild steel 250-550 MPa; high-strength steel to 2,000 MPa; carbon fibre composites 1,500-7,000 MPa tensile. Hydraulic press pressures 50-200 MPa. Mariana Trench floor ~110 MPa. Concrete compressive strength: 25-40 MPa (normal); up to 150 MPa (high-performance). Water-jet cutting: 200-600 MPa. Elastic moduli in FEM analysis are in MPa or GPa. 1 MPa = 10⁶ Pa = 145.0 psi.
Quick Reference Table
| Pounds per Square Foot (lbf/ft²) | Megapascals (MPa) |
|---|---|
| 1 lbf/ft² | 4.788 × 10-5 MPa |
| 2 lbf/ft² | 9.576 × 10-5 MPa |
| 5 lbf/ft² | 0.000239401 MPa |
| 10 lbf/ft² | 0.000478803 MPa |
| 25 lbf/ft² | 0.00119701 MPa |
| 50 lbf/ft² | 0.00239401 MPa |
| 100 lbf/ft² | 0.00478803 MPa |