Atmospheres to Millibars Converter
Enter the pressure in atmospheres below to convert it to millibars.
Result in Millibars:
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How to Convert Atmospheres to Millibars
To convert a measurement in atmospheres to a measurement in millibars, multiply the pressure by the following conversion ratio: 1,013.25 millibars/atmosphere.
Since one atmosphere is equal to 1,013.25 millibars, you can use this simple formula to convert:
millibars = atmospheres × 1,013.25
The pressure in millibars is equal to the pressure in atmospheres multiplied by 1,013.25.
For example, here's how to convert 5 atmospheres to millibars using the formula above.
millibars = (5 atm × 1,013.25) = 5,066.25 mbar
Atmospheres and millibars are both units used to measure pressure. Keep reading to learn more about each unit of measure.
What Is an Atmosphere?
The atmosphere is a reference measure of pressure equal to 101,325 pascals or 1,013,250 dynes. The atmosphere was originally defined as the pressure of 760 millimeters of mercury at standard gravity at 0 °C, but was later redefined in 1954 to be equal to 1,013,250 dynes.
Atmospheres can be abbreviated as atm; for example, 1 atmosphere can be written as 1 atm.
Learn more about atmospheres.
What 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.
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.
Learn more about millibars.
Atmosphere to Millibar Conversion Table
| Atmospheres | Millibars |
|---|---|
| 0.001 atm | 1.0133 mbar |
| 0.002 atm | 2.0265 mbar |
| 0.003 atm | 3.0398 mbar |
| 0.004 atm | 4.053 mbar |
| 0.005 atm | 5.0663 mbar |
| 0.006 atm | 6.0795 mbar |
| 0.007 atm | 7.0928 mbar |
| 0.008 atm | 8.106 mbar |
| 0.009 atm | 9.1193 mbar |
| 0.01 atm | 10.13 mbar |
| 0.02 atm | 20.27 mbar |
| 0.03 atm | 30.4 mbar |
| 0.04 atm | 40.53 mbar |
| 0.05 atm | 50.66 mbar |
| 0.06 atm | 60.8 mbar |
| 0.07 atm | 70.93 mbar |
| 0.08 atm | 81.06 mbar |
| 0.09 atm | 91.19 mbar |
| 0.1 atm | 101.33 mbar |
| 0.2 atm | 202.65 mbar |
| 0.3 atm | 303.98 mbar |
| 0.4 atm | 405.3 mbar |
| 0.5 atm | 506.63 mbar |
| 0.6 atm | 607.95 mbar |
| 0.7 atm | 709.28 mbar |
| 0.8 atm | 810.6 mbar |
| 0.9 atm | 911.93 mbar |
| 1 atm | 1,013 mbar |