mmHg to Bar Converter
Convert millimetres of mercury to bar — divide by 750.06. Results update as you type; exact factors shown.
One millimetre of mercury is 0.0013 bars — see the exact factor, not a rounded rule of thumb.
How the mmhg 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 |
|---|---|---|
| 10 mmHg | 0.0133 bar | millimetre of mercurys to bars |
| 50 mmHg | 0.0667 bar | millimetre of mercurys to bars |
| 100 mmHg | 0.1333 bar | millimetre of mercurys to bars |
| 200 mmHg | 0.2666 bar | millimetre of mercurys to bars |
| 500 mmHg | 0.6666 bar | millimetre of mercurys to bars |
| 750 mmHg | 0.9999 bar | millimetre of mercurys to bars |
| 760 mmHg | 1.0133 bar | millimetre of mercurys to bars |
| 1,000 mmHg | 1.3332 bar | millimetre of mercurys to bars |
| 1,520 mmHg | 2.0265 bar | millimetre of mercurys to bars |
| 2,000 mmHg | 2.6664 bar | millimetre of mercurys to bars |
| 5,000 mmHg | 6.6661 bar | millimetre of mercurys to bars |
| 7,500 mmHg | 9.9992 bar | millimetre of mercurys 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 mmHg in a bar?
750.06.
What is 760 mmHg?
1.01325 bar — one standard atmosphere.
What is 750 mmHg?
Almost exactly one bar.
Why does weather use hectopascals?
Because a hectopascal is a millibar, so the numbers matched the older charts exactly when meteorology went metric.
What is a strong vacuum?
Below 1 mmHg, which is 0.00133 bar.
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.