MPa to PSI Converter
Convert megapascals to pounds per square inch — one MPa is 145.04 psi. Results update as you type; exact factors shown.
One megapascal is 145.0377 pounds per square inch — see the exact factor, not a rounded rule of thumb.
How the mpa to psi converter works
Pressures convert through the pascal (1 N/m²). One bar is exactly 100 kPa; a standard atmosphere is exactly 101.325 kPa; 1 psi is 6.894757 kPa (a pound-force on a square inch); 1 mmHg is 133.322 Pa by the conventional definition.
The UK is metric for most trade and science but keeps miles, pints, stone and mpg (with the imperial gallon) in daily life.
Common pressure conversions
| From | To | Units |
|---|---|---|
| 0.1 MPa | 14.5038 psi | megapascals to pounds per square inch |
| 0.5 MPa | 72.5189 psi | megapascals to pounds per square inch |
| 1 MPa | 145.0377 psi | megapascal to pounds per square inch |
| 2 MPa | 290.0755 psi | megapascals to pounds per square inch |
| 5 MPa | 725.1887 psi | megapascals to pounds per square inch |
| 10 MPa | 1,450.3774 psi | megapascals to pounds per square inch |
| 20 MPa | 2,900.7548 psi | megapascals to pounds per square inch |
| 30 MPa | 4,351.1321 psi | megapascals to pounds per square inch |
| 40 MPa | 5,801.5095 psi | megapascals to pounds per square inch |
| 50 MPa | 7,251.8869 psi | megapascals to pounds per square inch |
| 100 MPa | 14,503.7738 psi | megapascals to pounds per square inch |
| 200 MPa | 29,007.5475 psi | megapascals to pounds per square inch |
Units in this converter and their exact factors
| Unit | Symbol | One unit in pascals |
|---|---|---|
| pascal | Pa | 1 pascal |
| kilopascal | kPa | 1,000 pascal |
| megapascal | MPa | 1,000,000 pascal |
| bar | bar | 100,000 pascal |
| millibar (hectopascal) | mbar | 100 pascal |
| standard atmosphere | atm | 101,325 pascal |
| pound per square inch | psi | 6,894.757293168 pascal |
| millimetre of mercury | mmHg | 133.322387415 pascal |
| inch of mercury | inHg | 3,386.389 pascal |
FAQFrequently asked questions about pressure conversion
How many psi in a MPa?
145.038 psi.
Where are megapascals used?
Material strength, hydraulics and concrete grades — a 40 MPa concrete is about 5,800 psi.
What is 10 MPa in psi?
1,450 psi.
What is a common hydraulic pressure?
20 to 35 MPa, or roughly 3,000 to 5,000 psi.
What is 1 MPa in bar?
10 bar.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Physical Laboratory (NPL) — United Kingdom's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.