Pounds per Square Inch to Megapascals Converter
1 pound per square inch ≈ 0.00689475729 megapascals
1 pound per square inch equals 0.00689476 megapascals
How to convert pounds per square inch to megapascals
Unit conversion preserves the pressure reference. Gauge pressure and absolute pressure are different readings; changing between them also needs the ambient pressure. Mercury and water-column units use the conventions stated in their unit notes.
MPa = psi × 0.006894757293One pound per square inch is 0.006894757293 megapascals, so a single multiplication converts any value.
0.0689476 MPa ≈ 10 × 0.006894757293Pounds per square inch to megapascals conversion table
Common values in pounds per square inch, converted to megapascals.
| Pounds per square inch (psi) | Megapascals (MPa) |
|---|---|
| 1 | 0.0068947573 |
| 2 | 0.013789515 |
| 3 | 0.020684272 |
| 4 | 0.027579029 |
| 5 | 0.034473786 |
| 10 | 0.068947573 |
| 20 | 0.13789515 |
| 25 | 0.17236893 |
| 50 | 0.34473786 |
| 100 | 0.68947573 |
| 250 | 1.7236893 |
| 500 | 3.4473786 |
| 1,000 | 6.8947573 |
About these units
pound per square inchpsi
One pound-force per square inch. The US standard for tyre and fluid pressure.
megapascalMPa
One million pascals. Used for material strength and hydraulic systems.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.