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.
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 | 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 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.