mbar
Definition
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.
Common uses
- Weather reports and atmospheric pressure
- Altimetry and aviation
- Historical weather records
🌍 Real-world scale
Sea-level average: 1013 mbar. Deep low-pressure storm: below 980 mbar. Hurricane eye: below 920 mbar.
Convert from millibars
9 conversionsMillibar to Pascal1 mbar = 100 PaMillibar to Kilopascal1 mbar = 0.1 kPaMillibar to Megapascal1 mbar = 0.0001 MPaMillibar to Bar1 mbar = 0.001 barMillibar to Pound per Square Inch1 mbar = 0.0145 psiMillibar to Atmosphere1 mbar = 0.0009869 atmMillibar to Millimeter of Mercury1 mbar = 0.7501 mmHgMillibar to Torr1 mbar = 0.7501 TorrMillibar to Inch of Mercury1 mbar = 0.02953 inHg
Convert to millibars
9 conversionsPascal to Millibar1 Pa = 0.01 mbarKilopascal to Millibar1 kPa = 10 mbarMegapascal to Millibar1 MPa = 10,000 mbarBar to Millibar1 bar = 1,000 mbarPound per Square Inch to Millibar1 psi = 68.9476 mbarAtmosphere to Millibar1 atm = 1,013.25 mbarMillimeter of Mercury to Millibar1 mmHg = 1.33322 mbarTorr to Millibar1 Torr = 1.33322 mbarInch of Mercury to Millibar1 inHg = 33.8639 mbar
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.
Common mistakes
- 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.
FAQ about the millibar
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