A millibar is 100 pascals.
Millibars to Gigapascals Converter — mbar to GPa
Convert Millibar (mbar) to Gigapascal (GPa) using the exact conversion factor (1 millibar = 1e-7 gigapascal). See the formula, worked examples, and conversion table.
Millibars to Gigapascals 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.
Gigapascal is 1000000000 pascal units.
Result = input x 100 / 1e+9.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millibars to Gigapascals
Millibar and Gigapascal 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 gigapascal is 1000000000 pascal units.
Formula
gigapascals = millibars × 1e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 millibar equals 100 base units, and 1 gigapascal equals 1000000000 base units, so dividing one by the other gives the direct millibar-to-gigapascal factor of 1e-7.
Simple example
1 mbar × 1e-7 = 1e-7 GPa
1 millibar = 1e-7 gigapascals.
Real-world example
35 mbar × 1e-7 = 0.0000035 GPa
35 millibars = 0.0000035 gigapascals.
Conversion table
| Millibar (mbar) | Gigapascal (GPa) |
|---|---|
| 1 mbar | 1e-7 GPa |
| 5 mbar | 5e-7 GPa |
| 10 mbar | 0.000001 GPa |
| 25 mbar | 0.0000025 GPa |
| 50 mbar | 0.000005 GPa |
| 100 mbar | 0.00001 GPa |
Reverse conversion: Gigapascal to Millibar
1e-7 GPa × 10000000 = 1 mbar
1e-7 gigapascals = 1 millibar.
millibars = gigapascals × 10000000
For a page dedicated to this direction, see Gigapascal to Millibar.
Understanding the Millibar (mbar)
A millibar is 100 pascals.
Understanding the Gigapascal (GPa)
Gigapascal is 1000000000 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigapascals are in 1 millibar?
1 millibar equals 1e-7 gigapascals, using the exact defined conversion factor rather than an estimate.
How do I convert millibar to gigapascal?
Multiply the millibar value by 1e-7. The converter above does this instantly to whatever precision you set.
How do I convert gigapascal back to millibar?
Use the reverse factor: 1 gigapascal equals 10,000,000 millibars. 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 gigapascal?
Gigapascal (GPa) is a unit of pressure.
Is the millibar to gigapascal conversion exact?
Yes. Both millibar and gigapascal are defined by fixed standards rather than physical artifacts, so the factor of 1e-7 used above is exact to as many digits as you choose to display.