Convert Megapascals to Pounds per Square Inch
Convert Megapascals (MPa) to Pounds per Square Inch (psi) instantly and accurately.
Conversion Formula
psi = MPa × 145.0377377
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.
About Pounds per Square Inch
One pound per square inch (psi) ≈ 6,894.76 Pa - the dominant pressure unit in US industry and consumer products. Car tyres: 32-36 psi; truck tyres 80-120 psi; bicycle road tyres 80-130 psi. Home water supply: 40-80 psi; residential maximum 80 psi per plumbing code. Compressed air tools: 90-150 psi. Steam autoclave sterilisation: 15-30 psi. The distinction between gauge (psig) and absolute (psia) pressure is critical: gauge pressure is relative to ambient; absolute = gauge + ~14.696 psi. 1 psi = 6,894.76 Pa.
Quick Reference Table
| Megapascals (MPa) | Pounds per Square Inch (psi) |
|---|---|
| 1 MPa | 145.038 psi |
| 2 MPa | 290.075 psi |
| 5 MPa | 725.189 psi |
| 10 MPa | 1450.38 psi |
| 25 MPa | 3625.94 psi |
| 50 MPa | 7251.89 psi |
| 100 MPa | 14503.8 psi |