Bar to MPa Converter
Convert bar to megapascals — divide by 10. Results update as you type; exact factors shown.
One bar is 0.1 megapascals — see the exact factor, not a rounded rule of thumb.
How the bar to mpa 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 |
|---|---|---|
| 1 bar | 0.1 MPa | bar to megapascals |
| 2 bar | 0.2 MPa | bars to megapascals |
| 5 bar | 0.5 MPa | bars to megapascals |
| 10 bar | 1 MPa | bars to megapascals |
| 20 bar | 2 MPa | bars to megapascals |
| 50 bar | 5 MPa | bars to megapascals |
| 100 bar | 10 MPa | bars to megapascals |
| 200 bar | 20 MPa | bars to megapascals |
| 250 bar | 25 MPa | bars to megapascals |
| 350 bar | 35 MPa | bars to megapascals |
| 500 bar | 50 MPa | bars to megapascals |
| 1,000 bar | 100 MPa | bars to megapascals |
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 MPa in a bar?
0.1 MPa exactly.
What is 200 bar?
20 MPa — a common hydraulic working pressure.
What is a scuba tank pressure?
About 200 to 300 bar, which is 20 to 30 MPa.
Is a bar the same as an atmosphere?
Almost — one atmosphere is 1.01325 bar.
What is 350 bar in psi?
About 5,076 psi.
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.