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 US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
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 |
| millimeter 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 Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.