Megapascal to PSI Converter
One Megapascal equals 145.0377377 PSI (1 MPa = 145.0377377 psi). Multiply a Megapascal value by 145.0377377 to get the equivalent in PSI. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
psi = MPa × 145.0377377
Multiply the Megapascal value by 145.0377377 to get the equivalent value in PSI.
Example Conversions
1 Megapascal (MPa)
145.0377377 PSI (psi)
5 Megapascal (MPa)
725.1886887 PSI (psi)
10 Megapascal (MPa)
1450.377377 PSI (psi)
25 Megapascal (MPa)
3625.943443 PSI (psi)
100 Megapascal (MPa)
14503.77377 PSI (psi)
Conversion Table
| Megapascal (MPa) | PSI (psi) |
|---|---|
| 0.1 | 14.50377377 |
| 0.5 | 72.51886887 |
| 1 | 145.0377377 |
| 2 | 290.0754755 |
| 5 | 725.1886887 |
| 10 | 1450.377377 |
| 25 | 3625.943443 |
| 50 | 7251.886887 |
| 100 | 14503.77377 |
| 250 | 36259.43443 |
| 500 | 72518.86887 |
| 1000 | 145037.7377 |
How to Convert Manually
Use these steps to convert Megapascal values to PSI without the calculator.
- Write down the value in Megapascal (MPa) that you want to convert.
- Multiply that value by 145.0377377.
- For example, 10 Megapascal × 145.0377377 = 1450.377377 PSI.
- Label the result as PSI (psi).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Megapascal and one PSI.
About Megapascal and PSI
The megapascal is one million pascals, equal to one newton per square millimeter. Concrete strength, steel stress, and hydraulic systems are rated in megapascals. The pound per square inch is about 6,894.757 pascals. US tire pressures, water systems, and industrial equipment are rated in psi. One Megapascal equals 145.0377377 PSI (1 MPa = 145.0377377 psi). Megapascal to PSI conversion comes up most often in concrete and steel strength ratings and in hydraulic system pressures, typically when figures need restating for US tire pressure.
Precision and Rounding: Several pressure factors are exact by definition (1 atm = 101,325 Pa; 1 bar = 100,000 Pa) while others, like psi and mmHg, are derived and carry long decimals. Tire and weather readings tolerate whole-number rounding; calibration, medicine, and process engineering need the full factor before rounding.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Megapascal equals 2175.566066 PSI.
15 MPa × 145.0377377 = 2175.566066 psi
FAQ
How do I convert Megapascal to PSI?
Multiply the Megapascal value by 145.0377377 to get the equivalent value in PSI.
What is the formula for Megapascal to PSI?
The formula is psi = MPa × 145.0377377.
How many PSI are in 1 Megapascal?
1 Megapascal equals 145.0377377 PSI.
Can I convert PSI back to Megapascal?
Yes. 1 PSI equals 0.006894757293 Megapascal, and the related converter can reverse the calculation.
What are common names for Megapascal and PSI?
Megapascal is shown as MPa and may also be searched as megapascals, mpa. PSI is shown as psi and may also be searched as pounds per square inch, lbf/in².
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