Millibars to Atmospheres
Convert millibars (mbar) to atmospheres (atm). Type in either box; the other updates as you go.
How to convert millibars to atmospheres
To convert millibars to atmospheres, divide the number of millibars by 1,013.25.
Example
Convert 50 millibars to atmospheres:
Millibar to atmosphere conversion chart
| Millibars (mbar) | Atmospheres (atm) |
|---|---|
| 10 mbar | 0.009869233 atm |
| 20 mbar | 0.01973847 atm |
| 30 mbar | 0.0296077 atm |
| 40 mbar | 0.03947693 atm |
| 50 mbar | 0.04934616 atm |
| 60 mbar | 0.0592154 atm |
| 70 mbar | 0.06908463 atm |
| 80 mbar | 0.07895386 atm |
| 90 mbar | 0.08882309 atm |
| 100 mbar | 0.09869233 atm |
| 120 mbar | 0.1184308 atm |
| 150 mbar | 0.1480385 atm |
| 200 mbar | 0.1973847 atm |
| 250 mbar | 0.2467308 atm |
| 300 mbar | 0.296077 atm |
| 400 mbar | 0.3947693 atm |
| 500 mbar | 0.4934616 atm |
| 600 mbar | 0.592154 atm |
| 700 mbar | 0.6908463 atm |
| 750 mbar | 0.7401925 atm |
| 800 mbar | 0.7895386 atm |
| 900 mbar | 0.8882309 atm |
| 1,000 mbar | 0.9869233 atm |
| 1,500 mbar | 1.480385 atm |
| 2,000 mbar | 1.973847 atm |
| 2,500 mbar | 2.467308 atm |
| 5,000 mbar | 4.934616 atm |
| 10,000 mbar | 9.869233 atm |
Going the other way? See the atmospheres to millibars chart.
About the units
Millibar (mbar)
A millibar is one thousandth of a bar, the same as a hectopascal. Weather reports use it.
Atmosphere (atm)
A standard atmosphere is exactly 101,325 pascals, average air pressure at sea level.
Frequently asked questions
How many atmospheres are in a millibar?
There are 0.0009869232667 atmospheres in a millibar.
How many millibars are in an atmosphere?
There are 1,013.25 millibars in an atmosphere.
How do you convert millibars to atmospheres?
To convert millibars to atmospheres, divide the number of millibars by 1,013.25.
What is 50 millibars in atmospheres?
50 millibars equals 0.0493462 atmospheres.
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