1 psi equals 0.00689476 MPa. To convert psi to MPa, multiply the value by 0.00689476; divide by 0.00689476 to convert back. Enter any number above and the result appears instantly — free and entirely in your browser.
How do you convert psi to MPa?
The conversion formula is MPa = psi × 0.00689476. The conversion factor is fixed by definition, so the result is always exact.
psi to MPa conversion table
| psi | MPa |
|---|---|
| 1 psi | 0.00689476 MPa |
| 2 psi | 0.0137895 MPa |
| 5 psi | 0.0344738 MPa |
| 10 psi | 0.0689476 MPa |
| 20 psi | 0.137895 MPa |
| 50 psi | 0.344738 MPa |
What is psi (psi)?
Pounds per square inch (psi) is the imperial pressure unit common in the US and UK, used for tyre pressure, air compressors and hydraulics. One psi equals about 6,895 pascals.
What is MPa (MPa)?
The megapascal (MPa) equals one million pascals, or 10 bar. It is used for material strength, high-pressure hydraulics and concrete specifications.
Why convert psi to MPa?
Pressure units differ by region and field: Europe uses bar, the US uses psi, science uses pascals and kilopascals, and medicine still uses mmHg. Converting between them is a daily need for mechanics, engineers and divers.
Standard atmospheric pressure is defined as exactly 101,325 Pa — equal to 1.01325 bar or 14.696 psi (BIPM/NIST). Car tyres are typically inflated to about 2.2–2.5 bar (32–36 psi).
How to convert psi to MPa
- Enter the value in psi into the left field of the converter.
- Read the result in MPa instantly in the right field — it updates automatically.
- Use the swap button to reverse the direction (MPa to psi).
The converter runs entirely in your browser: no uploads, no queue, no limits. You can even use it offline.