Millibars to Atmospheres Converter
Convert millibars (mbar) to atmospheres (atm) instantly. Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars.
Result
- Atmospheres
- 0.000987 atm
How to use the millibars to atmospheres converter
- Enter the millibars (mbar).
- The results update as you type, or press Calculate.
- Read the atmospheres first, then the supporting figures below it.
Formula
Atmospheres = millibars × 0.0009869233
Worked example
For example, with these inputs:
- Millibars (mbar): 1
the calculator returns:
- Atmospheres: 0.000987 atm
Millibars to Atmospheres table
| Millibars | Atmospheres |
|---|---|
| 1 mbar | 0.000987 atm |
| 2 mbar | 0.001974 atm |
| 5 mbar | 0.004935 atm |
| 10 mbar | 0.009869 atm |
| 20 mbar | 0.019738 atm |
| 25 mbar | 0.024673 atm |
| 50 mbar | 0.049346 atm |
| 100 mbar | 0.098692 atm |
| 250 mbar | 0.246731 atm |
| 500 mbar | 0.493462 atm |
| 1,000 mbar | 0.986923 atm |
About this conversion
Pressure conversions are used for tyre pressure (psi or bar), blood pressure readings in mmHg and weather maps in millibars.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Frequently asked questions
How many atmospheres are in one millibar?
1 mbar = 0.000987 atm.
How do I convert mbar to atm?
Atmospheres = millibars × 0.0009869233.