Bar to Millibar Converter
Convert bar to millibar — multiply by a thousand. Results update as you type; exact factors shown.
One bar is 1,000 millibar (hectopascal) — see the exact factor, not a rounded rule of thumb.
How the bar to millibar 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 |
|---|---|---|
| 0.001 bar | 1 mbar | bars to millibar (hectopascal) |
| 0.01 bar | 10 mbar | bars to millibar (hectopascal) |
| 0.1 bar | 100 mbar | bars to millibar (hectopascal) |
| 0.5 bar | 500 mbar | bars to millibar (hectopascal) |
| 1 bar | 1,000 mbar | bar to millibar (hectopascal) |
| 1.0133 bar | 1,013.25 mbar | bars to millibar (hectopascal) |
| 1.5 bar | 1,500 mbar | bars to millibar (hectopascal) |
| 2 bar | 2,000 mbar | bars to millibar (hectopascal) |
| 5 bar | 5,000 mbar | bars to millibar (hectopascal) |
| 10 bar | 10,000 mbar | bars to millibar (hectopascal) |
| 50 bar | 50,000 mbar | bars to millibar (hectopascal) |
| 200 bar | 200,000 mbar | bars to millibar (hectopascal) |
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 millibars in a bar?
Exactly 1,000.
What is standard atmospheric pressure?
1,013.25 mbar, which is 1.01325 bar.
Is a millibar the same as a hectopascal?
Yes — 1 mbar = 1 hPa = 100 Pa. Weather services use hPa; older charts use mbar.
What pressure is a deep low?
Below about 980 mbar; severe storms go under 950.
What is 2 bar in mbar?
2,000 mbar.
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.