Pressure
bartombar
Convert bar (bar) to millibars (mbar).
Factor1 bar = 1000 mbar
Converter
bar
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mbar
Rendered to 6 significant figures.
Formula
Formula
mbar = bar × 1000
Multiply any value in bar by 1000 to obtain the value in millibars.
Worked example
Convert 1 bar to mbar.
- 01Start with 1 bar.
- 02Multiply by the conversion factor: 1 × 1000 = 1000 mbar.
Result1 bar = 1000 mbar
Conversion table
| bar | mbar |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 1.0000e+5 |
| 200 | 2.0000e+5 |
| 500 | 5.0000e+5 |
| 1000 | 1.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from bar to mbar?
1 bar equals 1000 mbar. To convert, multiply the value in bar by 1000.
How do I convert 1 bar to mbar?
1 bar = 1000 mbar. For any value, multiply by 1000.
How do I convert mbar back to bar?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 mbar = 0.001 bar.
When would I need to convert bar to millibar?
Pressure conversions between bar and mbar 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).