PSI to Megapascal Converter
One PSI equals 0.006894757293 Megapascal (1 psi = 0.006894757293 MPa). Multiply a PSI value by 0.006894757293 to get the equivalent in Megapascal. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
MPa = psi × 0.006894757293
Multiply the PSI value by 0.006894757293 to get the equivalent value in Megapascal.
Example Conversions
1 PSI (psi)
0.006894757293 Megapascal (MPa)
5 PSI (psi)
0.03447378647 Megapascal (MPa)
10 PSI (psi)
0.06894757293 Megapascal (MPa)
25 PSI (psi)
0.1723689323 Megapascal (MPa)
100 PSI (psi)
0.6894757293 Megapascal (MPa)
Conversion Table
| PSI (psi) | Megapascal (MPa) |
|---|---|
| 0.1 | 0.0006894757293 |
| 0.5 | 0.003447378647 |
| 1 | 0.006894757293 |
| 2 | 0.01378951459 |
| 5 | 0.03447378647 |
| 10 | 0.06894757293 |
| 25 | 0.1723689323 |
| 50 | 0.3447378647 |
| 100 | 0.6894757293 |
| 250 | 1.723689323 |
| 500 | 3.447378647 |
| 1000 | 6.894757293 |
How to Convert Manually
Use these steps to convert PSI values to Megapascal without the calculator.
- Write down the value in PSI (psi) that you want to convert.
- Multiply that value by 0.006894757293.
- For example, 10 PSI × 0.006894757293 = 0.06894757293 Megapascal.
- Label the result as Megapascal (MPa).
Relative Size Comparison
This chart shows the visual difference in size between exactly one PSI and one Megapascal.
About PSI and Megapascal
The pound per square inch is about 6,894.757 pascals. US tire pressures, water systems, and industrial equipment are rated in 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. One PSI equals 0.006894757293 Megapascal (1 psi = 0.006894757293 MPa). PSI to Megapascal conversion comes up most often in US tire pressure and in US plumbing and well systems, typically when figures need restating for concrete and steel strength ratings.
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 PSI equals 0.1034213594 Megapascal.
15 psi × 0.006894757293 = 0.1034213594 MPa
FAQ
How do I convert PSI to Megapascal?
Multiply the PSI value by 0.006894757293 to get the equivalent value in Megapascal.
What is the formula for PSI to Megapascal?
The formula is MPa = psi × 0.006894757293.
How many Megapascal are in 1 PSI?
1 PSI equals 0.006894757293 Megapascal.
Can I convert Megapascal back to PSI?
Yes. 1 Megapascal equals 145.0377377 PSI, and the related converter can reverse the calculation.
What are common names for PSI and Megapascal?
PSI is shown as psi and may also be searched as pounds per square inch, lbf/in². Megapascal is shown as MPa and may also be searched as megapascals, mpa.
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