Megapascals to PSI Converter
Unit ConversionConvert megapascals to psi. 1 megapascal is about 145.037738 psi, with a conversion table and the reverse conversion.
PSI
Equivalent pressure or stress in psi
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SponsoredThis converter turns megapascals into psi (MPa to psi). Enter a value and the result updates as you type. 1 megapascal is about 145.037738 psi.
1 megapascal is exactly 1,000,000 pascals, the same as one newton per square millimeter. The psi is defined from the avoirdupois pound, standard gravity and the inch, which works out to about 6,894.757 pascals. So 1 MPa is about 145 psi, a handy quick estimate.
The result shows 0 for a negative entry. For gauge readings below the surrounding air, use the Megapascals to PSIG converter listed below. The result is rounded to 3 decimal places.
How to Convert Megapascals to PSI
To convert megapascals to psi, multiply by about 145.0377. For example, 30 MPa is about 4,351.132 psi.
To go from psi back to megapascals, divide psi by about 145.0377, or multiply by about 0.006894757.
Megapascals to PSI Conversion Table
Common MPa values converted to psi, rounded to 3 decimal places.
| Megapascals | PSI |
|---|---|
| 0.1 MPa | 14.504 psi |
| 0.5 MPa | 72.519 psi |
| 1 MPa | 145.038 psi |
| 2 MPa | 290.075 psi |
| 5 MPa | 725.189 psi |
| 10 MPa | 1,450.377 psi |
| 20 MPa | 2,900.755 psi |
| 25 MPa | 3,625.943 psi |
| 30 MPa | 4,351.132 psi |
| 50 MPa | 7,251.887 psi |
| 100 MPa | 14,503.774 psi |
| 250 MPa | 36,259.434 psi |
| 500 MPa | 72,518.869 psi |
MPa and PSI in Engineering
Hydraulic systems, gas cylinders and material strengths can be rated in MPa or in psi, depending on where the equipment comes from. Multiplying by 145 gives a quick estimate within 0.03%: 30 MPa is about 4,351 psi. For values in the thousands of psi, the US often switches to ksi, where 1 MPa is about 0.145 ksi. The pound in psi is a pound of force (lbf), not a pound of mass, which is why its value in pascals depends on standard gravity.
Concrete strength is a common MPa to psi conversion, and the Concrete Cylinder Calculator works out the volume for a round column. Beam stresses from the Bending Stress Calculator come out in psi, so divide by about 145 for MPa.
Frequently Asked Questions
What is 240 psi in MPa?
240 psi is about 1.654742 MPa.
What is 10 MPa in psi?
10 MPa is about 1,450.38 psi.
How do I convert psi to MPa?
Divide psi by about 145.0377. For example, 3,000 psi is about 20.684 MPa.
Is the Megapascals to PSI factor exact?
The factor is fixed by definitions, so it never changes, but it has no finite decimal form. 1 megapascal is about 145.037738 psi. The calculator uses the full value and rounds only the result it shows.
What happens if I enter a negative value?
It shows 0. This page treats values as zero or more. For a vacuum gauge reading, use the Megapascals to PSIG converter in the list of related converters.
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