MPa to Bar Converter
Convert megapascals to bar — one MPa is exactly 10 bar. Results update as you type; exact factors shown.
One megapascal is 10 bars — see the exact factor, not a rounded rule of thumb.
How the mpa to bar 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 | 1 bar | megapascals to bars |
| 0.5 MPa | 5 bar | megapascals to bars |
| 1 MPa | 10 bar | megapascal to bars |
| 2 MPa | 20 bar | megapascals to bars |
| 3 MPa | 30 bar | megapascals to bars |
| 5 MPa | 50 bar | megapascals to bars |
| 10 MPa | 100 bar | megapascals to bars |
| 15 MPa | 150 bar | megapascals to bars |
| 20 MPa | 200 bar | megapascals to bars |
| 30 MPa | 300 bar | megapascals to bars |
| 50 MPa | 500 bar | megapascals to bars |
| 100 MPa | 1,000 bar | megapascals to bars |
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 bar in a MPa?
Exactly 10, since a bar is 100,000 Pa.
What is 20 MPa?
200 bar — a typical hydraulic system pressure.
Which unit do engineers prefer?
MPa for material strength and structural work; bar for fluid systems and pneumatics.
What is 1 bar in psi?
14.504 psi.
Is a bar an SI unit?
No, but it is accepted for use with SI and is almost exactly one atmosphere.
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.