Convert Pounds per Square Inch to Gigapascals
Convert Pounds per Square Inch (psi) to Gigapascals (GPa) instantly and accurately.
Conversion Formula
GPa = psi × 6.894757293e-6
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.
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.
Quick Reference Table
| Pounds per Square Inch (psi) | Gigapascals (GPa) |
|---|---|
| 1 psi | 6.895 × 10-6 GPa |
| 2 psi | 1.379 × 10-5 GPa |
| 5 psi | 3.447 × 10-5 GPa |
| 10 psi | 6.895 × 10-5 GPa |
| 25 psi | 0.000172369 GPa |
| 50 psi | 0.000344738 GPa |
| 100 psi | 0.000689476 GPa |