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.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
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 Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.