Convert millibar to bar
Here you can quickly calculate how many bar fit in one millibar.
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- 1 mbar = 0.001 bar
- 1 bar = 1000 mbar
Conversion from millibar to bar example
- 1 millibar = 0.001 bar
Millibar to bar conversion table
| millibar | bar |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
Formula to convert millibar to bar
To convert millibar to bar, divide by 1000.
1 mbar = 0.001 bar
Example: 1 millibar = 0.001 bar
Common mistakes in pressure conversion
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Tire pressure is quoted in bar in Europe and psi in the US: 1 bar is about 14.5 psi. The recommended 2.5 bar equals about 36 psi, inflating to '25 psi' on the assumption they match leaves the tire dangerously underinflated. Multiply bar by 14.5 to get psi.
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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 to/from bar conversion quiz
Score:
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19.2 millibar equals 0.0192 bar.
Correct answer: 19.2 millibar = 0.0192 bar.
8.5 millibar equals 0.0085 bar.
Correct answer: 8.5 millibar = 0.0085 bar.
15.8 millibar equals 0.0158 bar.
Correct answer: 15.8 millibar = 0.0158 bar.
2.9 millibar equals 0.0029 bar.
Correct answer: 2.9 millibar = 0.0029 bar.