Convert Gigapascals to Pounds per Square Inch
Convert Gigapascals (GPa) to Pounds per Square Inch (psi) instantly and accurately.
Conversion Formula
psi = GPa × 145037.7377
About Gigapascals
A gigapascal (GPa) = 10⁹ Pa = 10 kbar - the extreme-pressure unit for materials science and planetary physics. Bulk moduli: fused silica 72 GPa; iron 170 GPa; diamond 442 GPa (highest known). Earth's inner core: 330-360 GPa. Jupiter's core: ~40,000-70,000 GPa. NIF laser-shocked experiments create 100-100,000 GPa to reproduce planetary interior conditions. Metallic hydrogen is predicted to form above ~500 GPa and has been tentatively observed at 400-500 GPa in diamond anvil cells. 1 GPa = 10⁹ Pa = 10 kbar.
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
| Gigapascals (GPa) | Pounds per Square Inch (psi) |
|---|---|
| 1 GPa | 145038 psi |
| 2 GPa | 290075 psi |
| 5 GPa | 725189 psi |
| 10 GPa | 1450380 psi |
| 25 GPa | 3625940 psi |
| 50 GPa | 7251890 psi |
| 100 GPa | 14503800 psi |