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Pressure

Convert millibars to millimeters of mercury

1 mbar=0.7501mmHg

Use the converter below to change any millibars value into millimeters of mercury instantly — with formula, conversion table, and real-world examples.

0.75006

Conversion formula

Forward
millimeters of mercury = millibars × 0.7501
Reverse
millibars = millimeters of mercury × 1.33322

Example: 10 mbar × 0.7501 = 7.50062 mmHg.

About both units

From

Millibar

mbar

The millibar equals 100 pascals or 1/1000 bar. It is the traditional unit for atmospheric pressure in meteorology (now called hectopascal, hPa, but numerically identical). Sea-level pressure averages 1013 mbar.

Real-world: Sea-level average: 1013 mbar. Deep low-pressure storm: below 980 mbar. Hurricane eye: below 920 mbar.
Read full millibar reference →
To

Millimeter of Mercury

mmHg

The millimetre of mercury equals about 133.3 Pa — the pressure exerted by a 1 mm column of mercury at 0 °C under standard gravity. Traditionally and still used in medicine: blood pressure of 120/80 mmHg.

Real-world: Normal blood pressure: 120/80 mmHg. Atmospheric: 760 mmHg. Good vacuum: <1 mmHg.
Read full millimeter of mercury reference →

Millibar to Millimeter of Mercury conversion table

Common millibars to millimeters of mercury values for quick reference.

Millibar (mbar)Millimeter of Mercury (mmHg)
1 mbar0.7501 mmHg
5 mbar3.75031 mmHg
10 mbar7.50062 mmHg
25 mbar18.7515 mmHg
50 mbar37.5031 mmHg
100 mbar75.0062 mmHg
200 mbar150.012 mmHg
500 mbar375.031 mmHg
1,000 mbar750.062 mmHg
5,000 mbar3,750.31 mmHg

Tips & common mistakes

Quick tips

  • 1 mbar = 1 hPa = 100 Pa.
  • Weather reports: "1013 hPa" and "1013 mbar" mean the same thing.
  • Hurricane strength correlates with central pressure drop.

Avoid these

  • Confusing mbar and bar — 1000× difference.
  • Using mbar for industrial pressures — too small.
  • Mixing hPa and mbar in casual writing without noting they are equal.

Frequently asked questions

How many millimeters of mercury in a millibar?
One millibar equals 0.7501 millimeters of mercury.
How do I convert millibars to millimeters of mercury?
Multiply the millibar value by 0.7501 to get the equivalent in millimeters of mercury.
What is 100 millibars in millimeters of mercury?
100 millibars equals 75.0062 millimeters of mercury.
Is a millibar bigger than a millimeter of mercury?
No. 1 millibar equals 0.7501 millimeters of mercury, so one millibar is smaller.
How to convert millibars to millimeters of mercury without a calculator?
Multiply by 0.75 for a quick estimate; use a calculator for precise results.

Related pressure conversions

📊 See full comparison matrix →

More from Millibar

mbar → Pa
1 = 100 Pa
mbar → kPa
1 = 0.1 kPa
mbar → MPa
1 = 0.0001 MPa
mbar → bar
1 = 0.001 bar
mbar → psi
1 = 0.0145 psi
mbar → atm
1 = 0.0009869 atm
mbar → Torr
1 = 0.7501 Torr
mbar → inHg
1 = 0.02953 inHg

More to Millimeter of Mercury

Pa → mmHg
1 = 0.007501 mmHg
kPa → mmHg
1 = 7.50062 mmHg
MPa → mmHg
1 = 7,500.62 mmHg
bar → mmHg
1 = 750.062 mmHg
psi → mmHg
1 = 51.7149 mmHg
atm → mmHg
1 = 760 mmHg
Torr → mmHg
1 = 1 mmHg
inHg → mmHg
1 = 25.4 mmHg

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