PSI to MPa Converter
Megapascals (MPa) are the SI unit for pressure in engineering applications, commonly used for material strength specifications, hydraulic system ratings, and process vessel design....
Formula
Source: Engineering Toolbox, NIST | Last reviewed: June 8, 2026
Examples
1 psi
= 0.00689 MPa
1 psi = 0.00689 MPa
1000 psi
= 6.895 MPa
3000 psi
= 20.68 MPa
Standard hydraulic system pressure
10000 psi
= 68.95 MPa
High-pressure water jetting system
Quick Reference Table
| PSI | MPa |
|---|---|
| 100 | 0.689 |
| 500 | 3.448 |
| 1000 | 6.895 |
| 3000 | 20.68 |
| 5000 | 34.47 |
| 10000 | 68.95 |
| 15000 | 103.4 |
Where is this used?
Material stress analysis: yield and tensile strengths are typically reported in MPa.
Pressure vessel and piping code compliance across ASME (psi) and EN (MPa) standards.
Frequently Asked Questions
What is a megapascal?
One megapascal (MPa) equals 1,000,000 pascals or 1 N/mm². It is approximately 145 psi. MPa is the preferred SI unit for expressing material strength and high pressures because it avoids large numbers that pascals would require.
How does MPa relate to bar?
1 MPa = 10 bar exactly. Since bar is widely used in European industry, many engineers convert psi → MPa → bar in two steps. 100 psi ≈ 6.9 bar ≈ 0.69 MPa.
What MPa rating corresponds to a 150 lb flange?
A Class 150 carbon steel flange has a pressure rating that varies with temperature. At ambient temperature, it's rated for approximately 1.96 MPa (285 psi). At 400°F, the rating drops to about 1.38 MPa (200 psi).
Reviewed for accuracy
· Last reviewed: June 8, 2026
All calculations are for reference only. Always verify with manufacturer data and a qualified engineer for critical applications. Learn about our editorial process.