Millibars (mbar)
The millibar is a thousandth of a bar, equal to one hectopascal.
Convert millibars to any pressure unit
1 millibar = 0.01450377377 pounds per square inch
Quick facts
- Unit
- Millibar (plural: millibars)
- Symbol
- mbar
- Measures
- Pressure / Stress
- System
- Metric (SI)
- Equals
- 100 pascals
- Definition
- One thousandth of a bar (100 Pa, equal to 1 hPa).
- Also written
- mb
1 millibar in other units
| Pounds per square inch | 0.01450377377 psi |
| Bars | 0.001 bar |
| Kilopascals | 0.1 kPa |
| Pascals | 100 Pa |
| Standard atmospheres | 0.000986923267 atm |
| Millimeters of mercury | 0.7500615758 mmHg |
| Hectopascals | 1 hPa |
| Megapascals | 0.0001 MPa |
What is a millibar?
The millibar is a thousandth of a bar, equal to one hectopascal. It was the traditional unit of weather maps and is still used in many forecasts. Standard sea-level pressure is 1013.25 mbar.
Where the millibar sits among pressure units
The millibar is number 13 of 44 on our scale of pressure units, ordered from smallest to largest.
Top millibar conversions
- Millibars to pounds per square inch
- Millibars to bars
- Millibars to kilopascals
- Millibars to pascals
- Millibars to standard atmospheres
- Millibars to millimeters of mercury
- Millibars to hectopascals
- Millibars to megapascals
- Millibars to inches of mercury
- Millibars to centimeters of water
- Millibars to inches of water
- Millibars to torr
Common amounts of millibars
- 0.25 mbar
- 0.5 mbar
- 0.75 mbar
- 1 mbar
- 1.5 mbar
- 2 mbar
- 2.5 mbar
- 3 mbar
- 4 mbar
- 5 mbar
- 6 mbar
- 7 mbar
- 8 mbar
- 9 mbar
- 10 mbar
- 11 mbar
- 12 mbar
- 13 mbar
- 14 mbar
- 15 mbar
- 16 mbar
- 17 mbar
- 18 mbar
- 19 mbar
- 20 mbar
- 21 mbar
- 22 mbar
- 23 mbar
- 24 mbar
- 25 mbar
- 26 mbar
- 27 mbar
- 28 mbar
- 29 mbar
- 30 mbar
- 31 mbar
- 32 mbar
- 33 mbar
- 34 mbar
- 35 mbar
- 36 mbar
- 37 mbar
- 38 mbar
- 39 mbar
- 40 mbar
- 41 mbar
- 42 mbar
- 43 mbar
- 44 mbar
- 45 mbar
- 46 mbar
- 47 mbar
- 48 mbar
- 49 mbar
- 50 mbar
- 60 mbar
- 70 mbar
- 80 mbar
- 90 mbar
- 100 mbar
- 150 mbar
- 200 mbar
- 250 mbar
- 300 mbar
- 400 mbar
- 500 mbar
- 750 mbar
- 1,000 mbar
Convert millibars to all 45 other units
Metric (SI)
- mbar to bar
- mbar to kPa
- mbar to Pa
- mbar to hPa
- mbar to MPa
- mbar to GPa
- mbar to barg
- mbar to kbar
- mbar to dbar
- mbar to cbar
- mbar to µbar
Atmospheres & mercury
- mbar to atm
- mbar to mmHg
- mbar to inHg
- mbar to Torr
- mbar to at
- mbar to cmHg
- mbar to µmHg
- mbar to mTorr
- mbar to ftHg
Water column
US & imperial
- mbar to psi
- mbar to psig
- mbar to ksi
- mbar to psf
- mbar to Mpsi
- mbar to ozf/in²
- mbar to LT/in²
- mbar to tonf/ft²
- mbar to pdl/ft²
Gravitational metric & CGS
Scientific
Convert to millibars
- Pounds per square inch to millibars
- Bars to millibars
- Kilopascals to millibars
- Pascals to millibars
- Standard atmospheres to millibars
- Millimeters of mercury to millibars
- Hectopascals to millibars
- Megapascals to millibars
- Inches of mercury to millibars
- Centimeters of water to millibars
- Inches of water to millibars
- Torr to millibars
Frequently asked questions
What is a millibar?
The millibar is a thousandth of a bar, equal to one hectopascal.
How is the millibar defined?
One thousandth of a bar (100 Pa, equal to 1 hPa).
How many pounds per square inch are in a millibar?
One millibar equals 0.01450377377 pounds per square inch.
How many bars are in a millibar?
One millibar equals 0.001 bars.
How many kilopascals are in a millibar?
One millibar equals 0.1 kilopascals.