mmHg to Millibar
Convert mmhg to millibar instantly. 1 mmHg = 1.3332238741 mbar. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert mmhg to millibar
To convert mmhg to millibar, multiply by 1.3332238741. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
mbar = mmHg × 1.3332238741
mmHg to Millibar conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| mmHg | Millibar |
|---|---|
| 1 mmHg | 1.333224 mbar |
| 2 mmHg | 2.666448 mbar |
| 3 mmHg | 3.999672 mbar |
| 5 mmHg | 6.666119 mbar |
| 10 mmHg | 13.332239 mbar |
| 20 mmHg | 26.664477 mbar |
| 25 mmHg | 33.330597 mbar |
| 50 mmHg | 66.661194 mbar |
| 100 mmHg | 133.322387 mbar |
| 500 mmHg | 666.611937 mbar |
| 1,000 mmHg | 1,333.22 mbar |
What is a mmhg?
Millimetres of mercury, still the clinical unit for blood pressure.
What is a millibar?
A thousandth of a bar, the meteorologist's unit for air pressure.
The formula
mbar = mmHg × 1.3332238741
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the mmHg to Millibar
- Type the number of mmhg you want to convert.
- Read the result in millibar straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked millibar to mmhg page.
mmHg to Millibar — frequently asked questions
How many millibar are in a mmhg?
One mmhg equals 1.3332238741 mbar. mbar = mmHg × 1.3332238741
What is the formula to convert mmhg to millibar?
The formula is mbar = mmHg × 1.3332238741. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert millibar back to mmhg?
Divide instead of multiplying: one millibar is 0.7500615758 mmHg. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this mmhg to millibar free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error