Convert millibar to standard atmosphere
Here you can quickly calculate how many standard atmosphere fit in one millibar.
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- 1 mbar = 0.000987 atm
- 1 atm = 1013.25 mbar
Example: millibar to standard atmosphere
- 1 millibar = 0.000987 standard atmosphere
Millibar to standard atmosphere conversion table
| millibar | standard atmosphere |
|---|---|
| 1 | 0.000987 |
| 2 | 0.001974 |
| 5 | 0.004935 |
| 10 | 0.009869 |
| 20 | 0.019738 |
| 50 | 0.049346 |
| 100 | 0.098692 |
Millibar to standard atmosphere formula
To convert millibar to standard atmosphere, multiply by 0.000987.
1 mbar = 0.000987 atm
Example: 1 millibar = 0.000987 standard atmosphere
Common pressure conversion mistakes
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One atmosphere is not exactly one bar: 1 atm = 1.01325 bar = 101.325 kPa. There is also the technical atmosphere (1 kgf/cm²) at about 0.981 bar. The ~1% differences rarely matter day to day, but engineering and diving calculations need the right unit.
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Blood pressure uses mmHg (120/80) and weather reports use hPa (around 1,013), different units that must not be mixed: 760 mmHg = 1,013.25 hPa. One mmHg is about 1.33 hPa.
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Hectopascals and millibars are exactly the same size: 1 hPa = 1 mbar. A chart showing 1,013 mbar and one showing 1,013 hPa agree perfectly, no conversion needed. Meteorology simply renamed the unit.
Quick millibar and standard atmosphere conversion quiz
Score:
0
20 standard atmosphere equals 101 000 millibar.
Correct answer: 20 standard atmosphere = 20 300 millibar.
2 millibar equals 0.000395 standard atmosphere.
Correct answer: 2 millibar = 0.00197 standard atmosphere.
20 millibar equals 0.0987 standard atmosphere.
Correct answer: 20 millibar = 0.0197 standard atmosphere.