Convert Megapascals to Kilopounds per Square Inch
Convert Megapascals (MPa) to Kilopounds per Square Inch (ksi) instantly and accurately.
Conversion Formula
ksi = MPa × 0.1450377377
About Megapascals
A megapascal (MPa) = 10⁶ Pa = 10 bar - standard unit for mechanical stress, material strength, and high-pressure engineering. Structural material yield strengths: mild steel 250-550 MPa; high-strength steel to 2,000 MPa; carbon fibre composites 1,500-7,000 MPa tensile. Hydraulic press pressures 50-200 MPa. Mariana Trench floor ~110 MPa. Concrete compressive strength: 25-40 MPa (normal); up to 150 MPa (high-performance). Water-jet cutting: 200-600 MPa. Elastic moduli in FEM analysis are in MPa or GPa. 1 MPa = 10⁶ Pa = 145.0 psi.
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.
Quick Reference Table
| Megapascals (MPa) | Kilopounds per Square Inch (ksi) |
|---|---|
| 1 MPa | 0.145038 ksi |
| 2 MPa | 0.290075 ksi |
| 5 MPa | 0.725189 ksi |
| 10 MPa | 1.45038 ksi |
| 25 MPa | 3.62594 ksi |
| 50 MPa | 7.25189 ksi |
| 100 MPa | 14.5038 ksi |