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Pressure

Convert millibars to inches of mercury

1 mbar=0.02953inHg

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

0.02953

Conversion formula

Forward
inches of mercury = millibars × 0.02953
Reverse
millibars = inches of mercury × 33.8639

Example: 10 mbar × 0.02953 = 0.2953 inHg.

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

Inch of Mercury

inHg

The inch of mercury equals about 3386 Pa. Used in US barometers, US aviation altimeter settings and some engineering. Standard sea-level pressure: 29.92 inHg.

Real-world: Sea-level standard: 29.92 inHg. Mountain pass at 3000 m: ~21 inHg. US aviation QNH given in inHg.
Read full inch of mercury reference →

Millibar to Inch of Mercury conversion table

Common millibars to inches of mercury values for quick reference.

Millibar (mbar)Inch of Mercury (inHg)
1 mbar0.02953 inHg
5 mbar0.1476 inHg
10 mbar0.2953 inHg
25 mbar0.7382 inHg
50 mbar1.4765 inHg
100 mbar2.953 inHg
200 mbar5.906 inHg
500 mbar14.765 inHg
1,000 mbar29.53 inHg
5,000 mbar147.65 inHg

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 inches of mercury in a millibar?
One millibar equals 0.02953 inches of mercury.
How do I convert millibars to inches of mercury?
Multiply the millibar value by 0.02953 to get the equivalent in inches of mercury.
What is 100 millibars in inches of mercury?
100 millibars equals 2.953 inches of mercury.
Is a millibar bigger than a inch of mercury?
No. 1 millibar equals 0.02953 inches of mercury, so one millibar is smaller.
How to convert millibars to inches of mercury without a calculator?
Multiply by 0.03 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 → mmHg
1 = 0.7501 mmHg
mbar → Torr
1 = 0.7501 Torr

More to Inch of Mercury

Pa → inHg
1 = 0.0002953 inHg
kPa → inHg
1 = 0.2953 inHg
MPa → inHg
1 = 295.3 inHg
bar → inHg
1 = 29.53 inHg
psi → inHg
1 = 2.03602 inHg
atm → inHg
1 = 29.9213 inHg
mmHg → inHg
1 = 0.03937 inHg
Torr → inHg
1 = 0.03937 inHg

Conversions in other categories

WeightKilogram → PoundLengthKilometer → MileTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourEnergyKilojoule → KilocaloriePowerKilowatt → Mechanical Horsepower