Pressure
hPatombar
Convert hectopascals (hPa) to millibars (mbar).
Factor1 hPa = 1 mbar
Converter
hPa
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mbar
Rendered to 6 significant figures.
Formula
Formula
mbar = hPa × 1
Multiply any value in hectopascals by 1 to obtain the value in millibars.
Worked example
Convert 1013.25 hPa to mbar.
- 01Start with 1013.25 hPa.
- 02Multiply by the conversion factor: 1013.25 × 1 = 1013.25 mbar.
Result1013.25 hPa = 1013.25 mbar
Conversion table
| hPa | mbar |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 5 | 5 |
| 10 | 10 |
| 20 | 20 |
| 50 | 50 |
| 100 | 100 |
| 200 | 200 |
| 500 | 500 |
| 1000 | 1000 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from hPa to mbar?
1 hPa equals 1 mbar. To convert, multiply the value in hectopascals by 1.
How do I convert 1 hPa to mbar?
1 hPa = 1 mbar. For any value, multiply by 1.
How do I convert mbar back to hPa?
Divide by the same factor — or equivalently, multiply by 1. So 1 mbar = 1 hPa.
When would I need to convert hectopascal to millibar?
Pressure conversions between hPa 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).