Convert Kilopounds per Square Inch to Millipascals
Convert Kilopounds per Square Inch (ksi) to Millipascals (mPa) instantly and accurately.
Conversion Formula
mPa = ksi × 6894757293
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 Millipascals
A millipascal (mPa) is 10⁻³ Pa. It appears primarily in rheology as the millipascal-second (mPa·s = centipoise) for dynamic viscosity: water at 20°C is 1.002 mPa·s; olive oil ~80 mPa·s; honey 2,000-10,000 mPa·s. Food technology, polymer processing, pharmaceutical formulation, and inkjet printing all specify flow behaviour in mPa·s. Partial pressures of trace atmospheric gases and ultra-high-vacuum leak rates measured by residual gas analysers are also expressed in millipascals. 1 mPa = 10⁻³ Pa.
Quick Reference Table
| Kilopounds per Square Inch (ksi) | Millipascals (mPa) |
|---|---|
| 1 ksi | 6.895 × 109 mPa |
| 2 ksi | 1.379 × 1010 mPa |
| 5 ksi | 3.447 × 1010 mPa |
| 10 ksi | 6.895 × 1010 mPa |
| 25 ksi | 1.724 × 1011 mPa |
| 50 ksi | 3.447 × 1011 mPa |
| 100 ksi | 6.895 × 1011 mPa |