PSI to Megapascals Converter

One PSI equals 0.006894757293 Megapascals (1 psi = 0.006894757293 MPa). Multiply a PSI value by 0.006894757293 to get the equivalent in Megapascals. Use the calculator above for your value, or check the examples and reference table below.

Formula

MPa = psi × 0.006894757293

Multiply the PSI value by 0.006894757293 to get the equivalent value in Megapascals.

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

Common conversion values from PSI to Megapascal
PSI (psi)Megapascal (MPa)
0.10.0006894757293
0.50.003447378647
10.006894757293
20.01378951459
50.03447378647
100.06894757293
250.1723689323
500.3447378647
1000.6894757293
2501.723689323
5003.447378647
10006.894757293

How to Convert Manually

Use these steps to convert PSI values to Megapascal without the calculator.

  1. Write down the value in PSI (psi) that you want to convert.
  2. Multiply that value by 0.006894757293.
  3. For example, 10 PSI × 0.006894757293 = 0.06894757293 Megapascals.
  4. Label the result as Megapascal (MPa).

Relative Size Comparison

1 PSI
1 Megapascal145.0377377 PSI
1 MPa

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 Megapascals (1 psi = 0.006894757293 MPa). PSI is used in US tire pressure and in US plumbing and well systems. Megapascal is used in 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.

Use the pressure conversion guide to compare mmHg, mbar, inHg, kPa, Pa, and torr across medical, weather, aviation, vacuum, and engineering work.

Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).

Worked Example

15PSI equals0.1034213594Megapascals.

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 Megapascals.

What is the formula for PSI to Megapascal?

The formula is MPa = psi × 0.006894757293.

How many Megapascals are in 1 PSI?

1 PSI equals 0.006894757293 Megapascals.

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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