Pressure
mbartobar
Convert millibars (mbar) to bar (bar).
Factor1 mbar = 0.001 bar
Converter
mbar
Accepts numbers or expressions, e.g. 150 + 14.7
Result
bar
Rendered to 6 significant figures.
Formula
Formula
bar = mbar × 0.001
Multiply any value in millibars by 0.001 to obtain the value in bar.
Worked example
Convert 1000 mbar to bar.
- 01Start with 1000 mbar.
- 02Multiply by the conversion factor: 1000 × 0.001 = 1 bar.
Result1000 mbar = 1 bar
Conversion table
| mbar | bar |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mbar to bar?
1 mbar equals 0.001 bar. To convert, multiply the value in millibars by 0.001.
How do I convert 1 mbar to bar?
1 mbar = 0.001 bar. For any value, multiply by 0.001.
How do I convert bar back to mbar?
Divide by the same factor — or equivalently, multiply by 1000. So 1 bar = 1000 mbar.
When would I need to convert millibar to bar?
Pressure conversions between mbar and bar are common when working with mixed-vendor instrumentation, when piping codes use different units to process datasheets, or when converting field readings into SI for hydraulic calculations.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).