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Pressure
Psi to Megapascals
Convert psi (psi) to megapascals (MPa). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 psi = 0.006895 MPa
Psi to Megapascals Conversion Table
Common values, ready to copy:
| psi | megapascals |
|---|---|
| 1 psi | 0.006895 MPa |
| 2 psi | 0.01379 MPa |
| 5 psi | 0.034474 MPa |
| 10 psi | 0.068948 MPa |
| 25 psi | 0.172369 MPa |
| 50 psi | 0.344738 MPa |
| 100 psi | 0.689476 MPa |
| 1,000 psi | 6.8948 MPa |
Formula
megapascals = psi × 6.89476000e-3
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
About Psi and Megapascals
Psi (psi): Pounds-force per square inch, the customary US pressure unit; 1 psi = 6,894.76 Pa. Common uses: US tire pressure (car tires typically 30-35 psi), US gas grills (10-12 psi propane), industrial hydraulics in the US, and US plumbing pressure specifications.
Megapascals (MPa): A million pascals, or 10 bar; the unit for high-pressure engineering contexts. Common uses: Concrete and steel strength specifications, hydraulic systems, deep-water pressures, and some industrial process measurements.
How the conversion works
Pressure is force per area. 1 atm = 101.325 kPa = 14.696 psi = 760 mmHg. Bar is a metric working unit close to atmospheric pressure (1 bar = 100 kPa).
The exact relationship is megapascals = psi × 6.89476000e-3, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between psi and megapascals comes up wherever pressure measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.