Convert Kilopounds per Square Inch to Gigapascals
Convert Kilopounds per Square Inch (ksi) to Gigapascals (GPa) instantly and accurately.
Conversion Formula
GPa = ksi × 0.006894757293
About Kilopounds per Square Inch
One ksi (kilopound per square inch) = 1,000 psi ≈ 6.895 MPa - the standard engineering stress unit in the US. ASTM A36 structural steel: 36 ksi yield, 58-80 ksi tensile. ASTM A325 high-strength bolts: 92 ksi proof load. AISC steel construction tables, FAA/MIL-SPEC aerospace allowables, and ASME Section VIII pressure vessel design all use ksi. Fracture toughness (K_IC) for steels: 50-200 ksi·√in. Convenient because it keeps large structural stresses as manageable 3-digit numbers. 1 ksi = 6.895 MPa.
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
| Kilopounds per Square Inch (ksi) | Gigapascals (GPa) |
|---|---|
| 1 ksi | 0.00689476 GPa |
| 2 ksi | 0.0137895 GPa |
| 5 ksi | 0.0344738 GPa |
| 10 ksi | 0.0689476 GPa |
| 25 ksi | 0.172369 GPa |
| 50 ksi | 0.344738 GPa |
| 100 ksi | 0.689476 GPa |