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
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
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.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting mmHgs to Millibars
mmHg and Millibar both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. 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
35 mmHg × 1.333223874 = 46.6628356 mbar
35 mmhgs = 46.6628356 millibars.
Conversion table
| mmHg (mmHg) | Millibar (mbar) |
|---|---|
| 1 mmHg | 1.333223874 mbar |
| 5 mmHg | 6.666119371 mbar |
| 10 mmHg | 13.33223874 mbar |
| 25 mmHg | 33.33059685 mbar |
| 50 mmHg | 66.66119371 mbar |
| 100 mmHg | 133.3223874 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 pressure.
What is a millibar?
Millibar (mbar) is a unit of pressure.
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.