Gigapascal is 1000000000 pascal units.
Gigapascals to Ronnapascals Converter — GPa to RPa
Convert Gigapascal (GPa) to Ronnapascal (RPa) using the exact conversion factor (1 gigapascal = 1e-18 ronnapascal). See the formula, worked examples, and conversion table.
Gigapascals to Ronnapascals 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.
Ronnapascal is 1e+27 pascal units.
Result = input x 1e+9 / 1e+27.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gigapascals to Ronnapascals
Gigapascal and Ronnapascal 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: Gigapascal is 1000000000 pascal units, and ronnapascal is 1e+27 pascal units.
Formula
ronnapascals = gigapascals × 1e-18
This factor comes from each unit's defined relationship to the category's base unit: 1 gigapascal equals 1000000000 base units, and 1 ronnapascal equals 1e+27 base units, so dividing one by the other gives the direct gigapascal-to-ronnapascal factor of 1e-18.
Simple example
1 GPa × 1e-18 = 1e-18 RPa
1 gigapascal = 1e-18 ronnapascals.
Real-world example
35 GPa × 1e-18 = 3.5e-17 RPa
35 gigapascals = 3.5e-17 ronnapascals.
Conversion table
| Gigapascal (GPa) | Ronnapascal (RPa) |
|---|---|
| 1 GPa | 1e-18 RPa |
| 5 GPa | 5e-18 RPa |
| 10 GPa | 1e-17 RPa |
| 25 GPa | 2.5e-17 RPa |
| 50 GPa | 5e-17 RPa |
| 100 GPa | 1e-16 RPa |
Reverse conversion: Ronnapascal to Gigapascal
1e-18 RPa × 1e+18 = 1 GPa
1e-18 ronnapascals = 1 gigapascals.
gigapascals = ronnapascals × 1e+18
For a page dedicated to this direction, see Ronnapascal to Gigapascal.
Understanding the Gigapascal (GPa)
Gigapascal is 1000000000 pascal units.
Understanding the Ronnapascal (RPa)
Ronnapascal is 1e+27 pascal units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ronnapascals are in 1 gigapascal?
1 gigapascal equals 1e-18 ronnapascals, using the exact defined conversion factor rather than an estimate.
How do I convert gigapascal to ronnapascal?
Multiply the gigapascal value by 1e-18. The converter above does this instantly to whatever precision you set.
How do I convert ronnapascal back to gigapascal?
Use the reverse factor: 1 ronnapascal equals 1e+18 gigapascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a gigapascal?
Gigapascal (GPa) is a unit of pressure.
What is a ronnapascal?
Ronnapascal (RPa) is a unit of pressure.
Is the gigapascal to ronnapascal conversion exact?
Yes. Both gigapascal and ronnapascal are defined by fixed standards rather than physical artifacts, so the factor of 1e-18 used above is exact to as many digits as you choose to display.