A millibar is 100 pascals.
Millibars to Hectopascals Converter — mbar to hPa
Convert Millibar (mbar) to Hectopascal (hPa) using the exact conversion factor (1 millibar = 1 hectopascal). See the formula, worked examples, and conversion table.
Millibars to Hectopascals converter
Converter
Pressure Converter
Convert pascals, bars, PSI, atmospheres, mercury columns, water columns, and engineering pressure units.
Context values
Some unit families need one extra value for a physically accurate result.
Hectopascal is 100 pascal units.
Result = input x 100 / 100.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millibars to Hectopascals
Millibar and Hectopascal both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. Specifically: A millibar is 100 pascals, and hectopascal is 100 pascal units.
Formula
hectopascals = millibars × 1
This factor comes from each unit's defined relationship to the category's base unit: 1 millibar equals 100 base units, and 1 hectopascal equals 100 base units, so dividing one by the other gives the direct millibar-to-hectopascal factor of 1.
Simple example
1 mbar × 1 = 1 hPa
1 millibar = 1 hectopascal.
Real-world example
35 mbar × 1 = 35 hPa
35 millibars = 35 hectopascals.
Conversion table
| Millibar (mbar) | Hectopascal (hPa) |
|---|---|
| 1 mbar | 1 hPa |
| 5 mbar | 5 hPa |
| 10 mbar | 10 hPa |
| 25 mbar | 25 hPa |
| 50 mbar | 50 hPa |
| 100 mbar | 100 hPa |
Reverse conversion: Hectopascal to Millibar
1 hPa × 1 = 1 mbar
1 hectopascal = 1 millibar.
millibars = hectopascals × 1
For a page dedicated to this direction, see Hectopascal to Millibar.
Understanding the Millibar (mbar)
A millibar is 100 pascals.
Understanding the Hectopascal (hPa)
Hectopascal is 100 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many hectopascals are in 1 millibar?
1 millibar equals 1 hectopascal, using the exact defined conversion factor rather than an estimate.
How do I convert millibar to hectopascal?
Multiply the millibar value by 1. The converter above does this instantly to whatever precision you set.
How do I convert hectopascal back to millibar?
Use the reverse factor: 1 hectopascal equals 1 millibar. You can also use the swap control in the converter above to flip the direction instantly.
What is a millibar?
Millibar (mbar) is a unit of pressure.
What is a hectopascal?
Hectopascal (hPa) is a unit of pressure.
Is the millibar to hectopascal conversion exact?
Yes. Both millibar and hectopascal are defined by fixed standards rather than physical artifacts, so the factor of 1 used above is exact to as many digits as you choose to display.