Megapascals to Psi
A megapascal is one million pascals, used to measure material strength like the tensile strength of steel. Pounds per square inch is the standard pressure unit for tire inflation and plumbing in the US. 1 MPa equals ≈145.038 psi, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to pressure, measured here against pressure's base unit (Pa) — every other pressure unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
psi = MPa × ≈145.038
MPa = psi × ≈0.00689476
Worked example: 5 MPa × ≈145.038 = ≈725.189 psi.
Conversion table
| Megapascal (MPa) | PSI (psi) |
|---|---|
| 1 MPa | ≈145.038 psi |
| 2 MPa | ≈290.075 psi |
| 3 MPa | ≈435.113 psi |
| 5 MPa | ≈725.189 psi |
| 10 MPa | ≈1,450.38 psi |
| 20 MPa | ≈2,900.75 psi |
| 25 MPa | ≈3,625.94 psi |
| 50 MPa | ≈7,251.89 psi |
| 100 MPa | ≈14,503.8 psi |
| 250 MPa | ≈36,259.4 psi |
| 500 MPa | ≈72,518.9 psi |
| 1,000 MPa | ≈145,038 psi |
Frequently asked
- How many PSI in a megapascal?
- 1 MPa equals ≈145.038 psi.
- How do I convert Megapascals to PSI?
- Multiply the value in MPa by ≈145.038 to get psi. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Megapascal and PSI are both defined by a fixed conversion factor to pressure's base unit (Pa), so the result shown is exact to the precision displayed, not an approximation.