Megapascals to psi
Type a value in megapascals to see it in psi straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the megapascals box.
- Read the result in psi as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
psi = MPa × 145.0377377
Multiply the value in megapascals by 145.0377377 to get psi.
Example
To convert 25 MPa to psi: 25 × 145.0377377 = 3,625.94 psi.
Conversion table
| Megapascals (MPa) | Psi (psi) |
|---|---|
| 1 | 145.038 |
| 2 | 290.075 |
| 3 | 435.113 |
| 5 | 725.189 |
| 10 | 1,450.38 |
| 20 | 2,900.75 |
| 25 | 3,625.94 |
| 50 | 7,251.89 |
| 100 | 14,503.8 |
| 250 | 36,259.4 |
| 500 | 72,518.9 |
| 1,000 | 145,038 |
About the units
- Megapascal
- Exactly one million pascals, used for concrete and steel strength and hydraulics. It equals one newton per square millimeter.
- Psi
- One pound-force per square inch, about 6894.757 pascals from the exact definitions of the pound, inch and standard gravity.
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 psi are in one megapascal?
1 MPa = 145.038 psi exactly.
How do I convert megapascals to psi?
Use psi = MPa × 145.0377377. For example, 25 MPa = 3,625.94 psi.
How many megapascals are in one psi?
1 psi = 0.00689476 MPa.
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.