PSI to MPa Converter
Type a value in pounds per square inch to see it in megapascals as you type, with the exact formula and a reference chart.
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- Atmospheres
- 680.46 atm
How this was calculated
- 1 megapascal = 145.0377377 pounds per square inch
- 10,000 ÷ 145.0377377 = 68.947573 MPa
| psi | MPa |
|---|---|
| 100 psi | 0.689476 MPa |
| 500 psi | 3.44738 MPa |
| 1,000 psi | 6.89476 MPa |
| 1,500 psi | 10.3421 MPa |
| 2,000 psi | 13.7895 MPa |
| 2,500 psi | 17.2369 MPa |
| 3,000 psi | 20.6843 MPa |
| 3,500 psi | 24.1317 MPa |
| 4,000 psi | 27.579 MPa |
| 4,500 psi | 31.0264 MPa |
| 5,000 psi | 34.4738 MPa |
| 6,000 psi | 41.3685 MPa |
| 8,000 psi | 55.1581 MPa |
| 10,000 psi | 68.9476 MPa |
| 15,000 psi | 103.421 MPa |
| 20,000 psi | 137.895 MPa |
| 30,000 psi | 206.843 MPa |
| 36,000 psi | 248.211 MPa |
| 50,000 psi | 344.738 MPa |
| 60,000 psi | 413.685 MPa |
| 100,000 psi | 689.476 MPa |
| MPa | psi |
|---|---|
| 0.1 MPa | 14.5038 psi |
| 0.5 MPa | 72.5189 psi |
| 1 MPa | 145.038 psi |
| 1.5 MPa | 217.557 psi |
| 2 MPa | 290.075 psi |
| 2.5 MPa | 362.594 psi |
| 3 MPa | 435.113 psi |
| 5 MPa | 725.189 psi |
| 10 MPa | 1,450.38 psi |
| 15 MPa | 2,175.57 psi |
| 20 MPa | 2,900.75 psi |
| 25 MPa | 3,625.94 psi |
How to convert pounds per square inch to megapascals
1 pound per square inch = 0.0068947573 megapascals. To convert pounds per square inch to megapascals, divide by 145.0377377 (or multiply by 0.0068947573). One psi is one pound-force on one square inch, exactly 6,894.757293168 Pa. A megapascal is 1,000,000 pascals (1 N/mm²).
Worked examples
- 3,000 pounds per square inch = 20.6843 MPa (3,000 ÷ 145.03774)
- 10,000 pounds per square inch = 68.9476 MPa (10,000 ÷ 145.03774)
- 36,000 pounds per square inch = 248.211 MPa (36,000 ÷ 145.03774)
Where this conversion comes up
Pounds per square inch are used for tire pressure, compressors and plumbing in the US; megapascals for concrete and steel strength, hydraulics. Divide by 145: 3,000 psi concrete is 20.7 MPa and 36,000 psi steel is 248 MPa. Material data sheets often list both.
Quick estimate
Divide by 145, or multiply by 0.0069.
Common mistakes
- Multiplying instead of dividing. A megapascal is larger than a pound per square inch, so the number of megapascals must come out smaller: 3,000 pounds per square inch = 20.6843 MPa.
- Rounding too early. Keep the full factor until the last step; rounding 0.00689 to 0.0069 first puts large values noticeably off.
Going the other way? Use the mpa to psi converter. Related pressure converters: bar to psi, psi to bar, kpa to psi, psi to kpa.
Frequently asked questions
How do you convert pounds per square inch to megapascals?
Multiply the pounds per square inch by 0.0068947573 (or divide by 145.0377377). For example, 10,000 pounds per square inch is 68.9476 megapascals.
How many megapascals are in one pound per square inch?
One pound per square inch is 0.0068947573 megapascals. One psi is one pound-force on one square inch, exactly 6,894.757293168 Pa.
What is 36,000 pounds per square inch in megapascals?
36,000 pounds per square inch is 248.211 megapascals.
Is there a quick way to estimate pounds per square inch to megapascals?
Divide by 145, or multiply by 0.0069.