Millimeters of mercury at standard gravity.
mmHgs to Millibars Converter — mmHg to mbar
Convert mmHg (mmHg) to Millibar (mbar) using the exact conversion factor (1 mmhg = 1.333223874 millibar). See the formula, worked examples, and conversion table.
mmHgs to Millibars converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
A millibar is 100 pascals.
Result = input x 133.3223874 / 100.
Stress Pressure units are compatible.
Reserved above the conversion cards and below the converter.
About Converting mmHgs to Millibars
mmHg and Millibar both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Millimeters of mercury at standard gravity, and a millibar is 100 pascals.
Formula
millibars = mmhgs × 1.33322387415
This factor comes from each unit's defined relationship to the category's base unit: 1 mmhg equals 133.322387415 base units, and 1 millibar equals 100 base units, so dividing one by the other gives the direct mmhg-to-millibar factor of 1.33322387415.
Simple example
1 mmHg × 1.333223874 = 1.333223874 mbar
1 mmhg = 1.333223874 millibars.
Real-world example
100 mmHg × 1.333223874 = 133.3223874 mbar
100 mmhgs = 133.3223874 millibars.
Conversion table
| mmHg (mmHg) | Millibar (mbar) |
|---|---|
| 1 mmHg | 1.333223874 mbar |
| 10 mmHg | 13.33223874 mbar |
| 50 mmHg | 66.66119371 mbar |
| 100 mmHg | 133.3223874 mbar |
| 500 mmHg | 666.6119371 mbar |
| 1,000 mmHg | 1,333.223874 mbar |
Reverse conversion: Millibar to mmHg
1.333223874 mbar × 0.7500615758 = 0.9999999999 mmHg
1.333223874 millibars = 0.9999999999 mmhgs.
mmhgs = millibars × 0.750061575846
For a page dedicated to this direction, see Millibar to mmHg.
Understanding the mmHg (mmHg)
Millimeters of mercury at standard gravity.
Understanding the Millibar (mbar)
A millibar is 100 pascals.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millibars are in 1 mmhg?
1 mmhg equals 1.333223874 millibars, using the exact defined conversion factor rather than an estimate.
How do I convert mmhg to millibar?
Multiply the mmhg value by 1.333223874. The converter above does this instantly to whatever precision you set.
How do I convert millibar back to mmhg?
Use the reverse factor: 1 millibar equals 0.7500615758 mmhgs. You can also use the swap control in the converter above to flip the direction instantly.
What is a mmhg?
mmHg (mmHg) is a unit of engineering.
What is a millibar?
Millibar (mbar) is a unit of engineering.
Is the mmhg to millibar conversion exact?
Yes. Both mmhg and millibar are defined by fixed standards rather than physical artifacts, so the factor of 1.333223874 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.