Psi to megapascals
Type a value in psi to see it in megapascals straight away, or type in the second box to convert back.
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How to use it
- Type the value in the psi box.
- Read the result in megapascals as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
MPa = psi × 0.006894757293
Multiply the value in psi by 0.006894757293 to get megapascals.
Example
To convert 25 psi to megapascals: 25 × 0.006894757293 = 0.172369 MPa.
Conversion table
| Psi (psi) | Megapascals (MPa) |
|---|---|
| 1 | 0.00689476 |
| 2 | 0.0137895 |
| 3 | 0.0206843 |
| 5 | 0.0344738 |
| 10 | 0.0689476 |
| 20 | 0.137895 |
| 25 | 0.172369 |
| 50 | 0.344738 |
| 100 | 0.689476 |
| 250 | 1.72369 |
| 500 | 3.44738 |
| 1,000 | 6.89476 |
About the units
- Psi
- One pound-force per square inch, about 6894.757 pascals from the exact definitions of the pound, inch and standard gravity.
- Megapascal
- Exactly one million pascals, used for concrete and steel strength and hydraulics. It equals one newton per square millimeter.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many megapascals are in one psi?
1 psi = 0.00689476 MPa exactly.
How do I convert psi to megapascals?
Use MPa = psi × 0.006894757293. For example, 25 psi = 0.172369 MPa.
How many psi are in one megapascal?
1 MPa = 145.038 psi.
What is the difference between gauge and absolute pressure?
Gauge pressure is measured from the surrounding air pressure, while absolute pressure starts from a perfect vacuum. These converters change the unit only, so a gauge reading stays a gauge reading.
Are torr and mmHg the same?
Almost. One torr is 101325/760 Pa, about 133.322368 Pa, and one conventional mmHg is 133.322387 Pa, a difference of less than one part per million. For everyday use you can treat them as equal.