Megapascals to PSI
Convert megapascals to psi instantly. 1 MPa = 145.0377377302 psi. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert megapascals to psi
To convert megapascals to psi, multiply by 145.0377377302. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
psi = MPa × 145.0377377302
Megapascals to PSI conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Megapascals | PSI |
|---|---|
| 1 MPa | 145.037738 psi |
| 2 MPa | 290.075475 psi |
| 3 MPa | 435.113213 psi |
| 5 MPa | 725.188689 psi |
| 10 MPa | 1,450.38 psi |
| 20 MPa | 2,900.75 psi |
| 25 MPa | 3,625.94 psi |
| 50 MPa | 7,251.89 psi |
| 100 MPa | 14,503.77 psi |
| 500 MPa | 72,518.87 psi |
| 1,000 MPa | 145,037.74 psi |
What is a megapascal?
A million pascals, used for material strength and hydraulics.
What is a psi?
Pounds per square inch, the US pressure unit for tyres and plumbing.
The formula
psi = MPa × 145.0377377302
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Megapascals to PSI
- Type the number of megapascals you want to convert.
- Read the result in psi straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked psi to megapascals page.
Megapascals to PSI — frequently asked questions
How many psi are in a megapascal?
One megapascal equals 145.0377377302 psi. psi = MPa × 145.0377377302
What is the formula to convert megapascals to psi?
The formula is psi = MPa × 145.0377377302. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert psi back to megapascals?
Divide instead of multiplying: one psi is 0.0068947573 MPa. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this megapascals to psi free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the megapascals to psi.
- megapascals to psi
- 1 megapascal to psi
- how many psi in a megapascal
- mpa2psi
- megapascals in psi
- megapascals to psi converter
- convert megapascals to psi
About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error