Convert Kilopounds per Square Inch to Bars
Convert Kilopounds per Square Inch (ksi) to Bars (bar) instantly and accurately.
Conversion Formula
bar = ksi × 68.94757293
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 Bars
A bar = exactly 100,000 Pa ≈ 0.987 atm - the world standard for industrial pressure outside North America. Hydraulic systems, pneumatic equipment, gas cylinders, dive computers, and tyre gauges in Europe and Asia use bar. Scuba diving: +1 bar per 10 m depth; at 40 m recreational limit = 5 bar absolute. European tyre pressure labels show bar alongside kPa. Industrial processes: steam at 10-50 bar; high-pressure reactors 100-300 bar; water-jet cutting 1,000-4,000 bar. 1 bar = 100,000 Pa = 14.504 psi.
Quick Reference Table
| Kilopounds per Square Inch (ksi) | Bars (bar) |
|---|---|
| 1 ksi | 68.9476 bar |
| 2 ksi | 137.895 bar |
| 5 ksi | 344.738 bar |
| 10 ksi | 689.476 bar |
| 25 ksi | 1723.69 bar |
| 50 ksi | 3447.38 bar |
| 100 ksi | 6894.76 bar |