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.
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 |
|---|---|---|
| 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 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.