MPa to PSI Converter
Convert megapascals (MPa) to pounds per square inch (psi) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
MPa to psi formula
psi = MPa × 145.03773773
1 megapascal = 145.04 pounds per square inch · 1 pound per square inch = 0.006895 megapascals
To convert megapascals to pounds per square inch, multiply the value by 145.03773773. For example, 20 MPa:
psi = 20 × 145.03773773psi = 2900.754755
So 20 MPa = 2900.75 psi.
Mental math shortcut
Quick mental estimate: multiply by 145. For 20 MPa that gives about 2900 psi — within 1% of the exact answer. Use the exact formula when precision matters.
MPa to psi conversion table
psi back to MPa
The same values converted the other way, rounded for everyday use:
| Pounds per square inch | Megapascals |
|---|---|
| 145.04 psi | 1 MPa |
| 1450.38 psi | 10 MPa |
| 2900.75 psi | 20 MPa |
| 4351.13 psi | 30 MPa |
| 5801.51 psi | 40 MPa |
| 14503.77 psi | 100 MPa |
| 36259.43 psi | 250 MPa |
About the units
Megapascals (MPa)
A megapascal is one million pascals (about 145 psi). Concrete strength and hydraulic pressures are given in MPa.
Pounds per square inch (psi)
Pounds per square inch is the US unit of pressure, used for tires and air compressors. 1 psi ≈ 0.0689 bar.
Frequently asked questions
How many pounds per square inch are in a megapascal?
One megapascal equals 145.04 pounds per square inch.
What is 20 MPa in psi?
20 MPa = 2900.75 psi.
How do I convert psi back to MPa?
Divide the pounds per square inch by 145.03773773.