Hectopascal is 100 pascal units.
Hectopascals to Gigapascals Converter — hPa to GPa
Convert Hectopascal (hPa) to Gigapascal (GPa) using the exact conversion factor (1 hectopascal = 1e-7 gigapascal). See the formula, worked examples, and conversion table.
Hectopascals 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 Hectopascals to Gigapascals
Hectopascal 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: Hectopascal is 100 pascal units, and gigapascal is 1000000000 pascal units.
Formula
gigapascals = hectopascals × 1e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 hectopascal equals 100 base units, and 1 gigapascal equals 1000000000 base units, so dividing one by the other gives the direct hectopascal-to-gigapascal factor of 1e-7.
Simple example
1 hPa × 1e-7 = 1e-7 GPa
1 hectopascal = 1e-7 gigapascals.
Real-world example
35 hPa × 1e-7 = 0.0000035 GPa
35 hectopascals = 0.0000035 gigapascals.
Conversion table
| Hectopascal (hPa) | Gigapascal (GPa) |
|---|---|
| 1 hPa | 1e-7 GPa |
| 5 hPa | 5e-7 GPa |
| 10 hPa | 0.000001 GPa |
| 25 hPa | 0.0000025 GPa |
| 50 hPa | 0.000005 GPa |
| 100 hPa | 0.00001 GPa |
Reverse conversion: Gigapascal to Hectopascal
1e-7 GPa × 10000000 = 1 hPa
1e-7 gigapascals = 1 hectopascal.
hectopascals = gigapascals × 10000000
For a page dedicated to this direction, see Gigapascal to Hectopascal.
Understanding the Hectopascal (hPa)
Hectopascal is 100 pascal units.
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 hectopascal?
1 hectopascal equals 1e-7 gigapascals, using the exact defined conversion factor rather than an estimate.
How do I convert hectopascal to gigapascal?
Multiply the hectopascal value by 1e-7. The converter above does this instantly to whatever precision you set.
How do I convert gigapascal back to hectopascal?
Use the reverse factor: 1 gigapascal equals 10,000,000 hectopascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a hectopascal?
Hectopascal (hPa) is a unit of pressure.
What is a gigapascal?
Gigapascal (GPa) is a unit of pressure.
Is the hectopascal to gigapascal conversion exact?
Yes. Both hectopascal 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.