EngiRef / Pressure conversion
Convert PSI to Megapascals (psi to MPa)
1 psi = 0.00689475729 MPa. Convert PSI to megapascals with the exact factor, a common-values table and a free converter.
Conversion factor
MPa = psi × 0.00689475729
1 psi = 0.00689475729 MPa
Multiply by 0.00689475729 MPa to go from PSI to megapascals, or divide by it to come back. The factor and every value below are computed by the same converter that runs at /convert, so this page and the tool cannot disagree.
psi to MPa table
| PSI (psi) | Megapascals (MPa) |
|---|---|
| 1 psi | 0.00689475729 MPa |
| 2 psi | 0.0137895146 MPa |
| 5 psi | 0.0344737865 MPa |
| 10 psi | 0.0689475729 MPa |
| 20 psi | 0.137895146 MPa |
| 50 psi | 0.344737865 MPa |
| 100 psi | 0.689475729 MPa |
Every figure is computed at build time by the site’s own converter from the pressure unit registry. For a value that is not listed, put it into the interactive converter.
Frequently asked questions
How many megapascals are in one PSI?
One PSI is 0.00689475729 MPa, so 100 psi is 0.689475729 MPa.
What is the formula to convert PSI to megapascals?
MPa = psi × 0.00689475729. Multiply the value in PSI by 0.00689475729 to get megapascals.
How do I convert megapascals back to PSI?
psi = MPa × 145.037738, so 1 MPa is 145.037738 psi. The MPa to psi page carries the same table in that direction.