Convert Pascals to Pounds per Square Inch
Convert Pascals (Pa) to Pounds per Square Inch (psi) instantly and accurately.
Conversion Formula
psi = Pa × 0.0001450377377
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.
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
| Pascals (Pa) | Pounds per Square Inch (psi) |
|---|---|
| 1 Pa | 0.000145038 psi |
| 2 Pa | 0.000290075 psi |
| 5 Pa | 0.000725189 psi |
| 10 Pa | 0.00145038 psi |
| 25 Pa | 0.00362594 psi |
| 50 Pa | 0.00725189 psi |
| 100 Pa | 0.0145038 psi |