Millibars to Atmospheres Converter
Enter the pressure in millibars below to convert it to atmospheres.
Result in Atmospheres:
Do you want to convert atmospheres to millibars?
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How to Convert Millibars to Atmospheres
To convert a measurement in millibars to a measurement in atmospheres, multiply the pressure by the following conversion ratio: 0.000987 atmospheres/millibar.
Since one millibar is equal to 0.000987 atmospheres, you can use this simple formula to convert:
atmospheres = millibars × 0.000987
The pressure in atmospheres is equal to the pressure in millibars multiplied by 0.000987.
For example, here's how to convert 5,000 millibars to atmospheres using the formula above.
atmospheres = (5,000 mbar × 0.000987) = 4.934616 atm
Millibars and atmospheres are both units used to measure pressure. Keep reading to learn more about each unit of measure.
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.
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.
Millibar to Atmosphere Conversion Table
| Millibars | Atmospheres |
|---|---|
| 1 mbar | 0.000987 atm |
| 2 mbar | 0.001974 atm |
| 3 mbar | 0.002961 atm |
| 4 mbar | 0.003948 atm |
| 5 mbar | 0.004935 atm |
| 6 mbar | 0.005922 atm |
| 7 mbar | 0.006908 atm |
| 8 mbar | 0.007895 atm |
| 9 mbar | 0.008882 atm |
| 10 mbar | 0.009869 atm |
| 20 mbar | 0.019738 atm |
| 30 mbar | 0.029608 atm |
| 40 mbar | 0.039477 atm |
| 50 mbar | 0.049346 atm |
| 60 mbar | 0.059215 atm |
| 70 mbar | 0.069085 atm |
| 80 mbar | 0.078954 atm |
| 90 mbar | 0.088823 atm |
| 100 mbar | 0.098692 atm |
| 200 mbar | 0.197385 atm |
| 300 mbar | 0.296077 atm |
| 400 mbar | 0.394769 atm |
| 500 mbar | 0.493462 atm |
| 600 mbar | 0.592154 atm |
| 700 mbar | 0.690846 atm |
| 800 mbar | 0.789539 atm |
| 900 mbar | 0.888231 atm |
| 1,000 mbar | 0.986923 atm |
| 2,000 mbar | 1.9738 atm |
| 3,000 mbar | 2.9608 atm |
| 4,000 mbar | 3.9477 atm |
| 5,000 mbar | 4.9346 atm |
| 6,000 mbar | 5.9215 atm |
| 7,000 mbar | 6.9085 atm |
| 8,000 mbar | 7.8954 atm |
| 9,000 mbar | 8.8823 atm |
| 10,000 mbar | 9.8692 atm |