Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Bar to Millimetres of mercury
Convert bar to mmHg instantly, then review the formula, assumptions, and rounding guidance.
Pressure & stressInstant result
Decimals
Formula result = input × 100000 ÷ 133.3223874. 1 bar = 750.0616 mmHg
Common examples
One value, several units
Pascals100,000 Pa
Kilopascals100 kPa
Megapascals0.1 MPa
Atmospheres0.9869 atm
Pounds per square inch14.5038 psi
Millimetres of mercury750.0616 mmHg
Conversion table
| bar | mmHg |
|---|---|
| 1 bar | 750.0616 mmHg |
| 2 bar | 1,500.1232 mmHg |
| 5 bar | 3,750.3079 mmHg |
| 10 bar | 7,500.6158 mmHg |
| 25 bar | 18,751.5394 mmHg |
| 50 bar | 37,503.0788 mmHg |
| 100 bar | 75,006.1576 mmHg |
Conversion chart
1 bar750.0616 mmHg
5 bar3,750.3079 mmHg
10 bar7,500.6158 mmHg
25 bar18,751.5394 mmHg
50 bar37,503.0788 mmHg
Worked example
Standard atmosphere is 101,325 pascals.
Unit definition
Bar (bar) One bar equals 100,000 pascal.
Unit history
Bar is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert bar to pascal.
3. Convert the base value to mmHg and apply your display precision.
Understand the result before using it
Bar to Millimetres of mercury converts a value measured in Bar (bar) into the equivalent value in Millimetres of mercury (mmHg). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 100000 ÷ 133.3223874
Assumptions
- Bar and Millimetres of mercury represent the same pressure & stress quantity.
- The input is expressed in bar; the output is expressed in mmHg.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 bar = 750.06157593 mmHg. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a bar measurement in a document that expects mmHg.
- Compare a bar value with a value reported in millimetres of mercury.
- Check the bar-to-mmHg arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse bar with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Bar to Millimetres of mercury?
result = input × 100000 ÷ 133.3223874 Using the displayed relationship, 1 bar equals 750.06157593 mmHg.
How many Millimetres of mercury are in one Bar?
One Bar is 750.06157593 Millimetres of mercury. The displayed digits may be rounded.
Can I reverse the bar to mmHg conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts mmHg back to bar.
Is the Bar to Millimetres of mercury result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.