Millibar (mbar) Conversion Calculator

Millibar Conversion Calculator

Enter a value in millibars below to convert to another unit of pressure.

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What Is a Millibar?

A millibar is a unit used to measure pressure.

The millibar is a non-SI metric unit for pressure. In the metric system, "milli" is the prefix for thousandths, or 10^-3. Millibars can be abbreviated as mbar; for example, 1 millibar can be written as 1 mbar.

Uses

The symbol mb was originally used to represent the millibar, but due to a conflict the use of the symbol mb is deprecated and the use of mbar is preferred. Due to it's convenient size, the millibar is commonly used in meteorology, although many meteorologists are also using the hectopascal, which is exactly equal in pressure.

How Much Is a Millibar?

One millibar is equal to one-thousandth of a bar, which is defined as the pressure of one newton per square meter. One millibar is also equal to one hectopascal.

How to Convert Millibars

To convert millibars to another unit of pressure, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.^[1]

You can find the conversion factors for millibars in the conversion table below.

Then, multiply the pressure measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

millibars × conversion factor = result

You can also use a calculator, such as one of the converters below, for the conversion.

Millibar Conversion Table

Common millibar values and equivalent imperial and metric pressure measurements
millibars	pascals	hectopascals	atmospheres	bars	kilograms per square centimeter	kilograms per square meter	pounds per square inch	pounds per square foot	torr
1 mbar	100 Pa	1 hPa	0.000987 atm	0.001 bar	0.00102 kgf/cm²	10.197162 kgf/m²	0.014504 psi	2.088546 psf	0.750062 Torr
2 mbar	200 Pa	2 hPa	0.001974 atm	0.002 bar	0.002039 kgf/cm²	20.394324 kgf/m²	0.029008 psi	4.177091 psf	1.500123 Torr
3 mbar	300 Pa	3 hPa	0.002961 atm	0.003 bar	0.003059 kgf/cm²	30.591486 kgf/m²	0.043511 psi	6.265637 psf	2.250185 Torr
4 mbar	400 Pa	4 hPa	0.003948 atm	0.004 bar	0.004079 kgf/cm²	40.788649 kgf/m²	0.058015 psi	8.354183 psf	3.000247 Torr
5 mbar	500 Pa	5 hPa	0.004935 atm	0.005 bar	0.005099 kgf/cm²	50.985811 kgf/m²	0.072519 psi	10.442728 psf	3.750308 Torr
6 mbar	600 Pa	6 hPa	0.005922 atm	0.006 bar	0.006118 kgf/cm²	61.182973 kgf/m²	0.087023 psi	12.531274 psf	4.50037 Torr
7 mbar	700 Pa	7 hPa	0.006908 atm	0.007 bar	0.007138 kgf/cm²	71.380135 kgf/m²	0.101527 psi	14.619819 psf	5.250432 Torr
8 mbar	800 Pa	8 hPa	0.007895 atm	0.008 bar	0.008158 kgf/cm²	81.577297 kgf/m²	0.11603 psi	16.708365 psf	6.000493 Torr
9 mbar	900 Pa	9 hPa	0.008882 atm	0.009 bar	0.009177 kgf/cm²	91.774459 kgf/m²	0.130534 psi	18.796911 psf	6.750555 Torr
10 mbar	1,000 Pa	10 hPa	0.009869 atm	0.01 bar	0.010197 kgf/cm²	101.971621 kgf/m²	0.145038 psi	20.885456 psf	7.500617 Torr
11 mbar	1,100 Pa	11 hPa	0.010856 atm	0.011 bar	0.011217 kgf/cm²	112.168783 kgf/m²	0.159542 psi	22.974002 psf	8.250679 Torr
12 mbar	1,200 Pa	12 hPa	0.011843 atm	0.012 bar	0.012237 kgf/cm²	122.365946 kgf/m²	0.174045 psi	25.062548 psf	9.00074 Torr
13 mbar	1,300 Pa	13 hPa	0.01283 atm	0.013 bar	0.013256 kgf/cm²	132.563108 kgf/m²	0.188549 psi	27.151093 psf	9.750802 Torr
14 mbar	1,400 Pa	14 hPa	0.013817 atm	0.014 bar	0.014276 kgf/cm²	142.76027 kgf/m²	0.203053 psi	29.239639 psf	10.500864 Torr
15 mbar	1,500 Pa	15 hPa	0.014804 atm	0.015 bar	0.015296 kgf/cm²	152.957432 kgf/m²	0.217557 psi	31.328184 psf	11.250925 Torr
16 mbar	1,600 Pa	16 hPa	0.015791 atm	0.016 bar	0.016315 kgf/cm²	163.154594 kgf/m²	0.232061 psi	33.41673 psf	12.000987 Torr
17 mbar	1,700 Pa	17 hPa	0.016778 atm	0.017 bar	0.017335 kgf/cm²	173.351756 kgf/m²	0.246564 psi	35.505276 psf	12.751049 Torr
18 mbar	1,800 Pa	18 hPa	0.017765 atm	0.018 bar	0.018355 kgf/cm²	183.548918 kgf/m²	0.261068 psi	37.593821 psf	13.50111 Torr
19 mbar	1,900 Pa	19 hPa	0.018752 atm	0.019 bar	0.019375 kgf/cm²	193.74608 kgf/m²	0.275572 psi	39.682367 psf	14.251172 Torr
20 mbar	2,000 Pa	20 hPa	0.019738 atm	0.02 bar	0.020394 kgf/cm²	203.943243 kgf/m²	0.290076 psi	41.770913 psf	15.001234 Torr