Attopascal is 1e-18 pascal units.
Attopascals to Gigapascals Converter — aPa to GPa
Convert Attopascal (aPa) to Gigapascal (GPa) using the exact conversion factor (1 attopascal = 1e-27 gigapascal). See the formula, worked examples, and conversion table.
Attopascals 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 1e-18 / 1e+9.
Pressure uses the pascal as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Attopascals to Gigapascals
Attopascal 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: Attopascal is 1e-18 pascal units, and gigapascal is 1000000000 pascal units.
Formula
gigapascals = attopascals × 1e-27
This factor comes from each unit's defined relationship to the category's base unit: 1 attopascal equals 1e-18 base units, and 1 gigapascal equals 1000000000 base units, so dividing one by the other gives the direct attopascal-to-gigapascal factor of 1e-27.
Simple example
1 aPa × 1e-27 = 1e-27 GPa
1 attopascal = 1e-27 gigapascals.
Real-world example
35 aPa × 1e-27 = 3.5e-26 GPa
35 attopascals = 3.5e-26 gigapascals.
Conversion table
| Attopascal (aPa) | Gigapascal (GPa) |
|---|---|
| 1 aPa | 1e-27 GPa |
| 5 aPa | 5e-27 GPa |
| 10 aPa | 1e-26 GPa |
| 25 aPa | 2.5e-26 GPa |
| 50 aPa | 5e-26 GPa |
| 100 aPa | 1e-25 GPa |
Reverse conversion: Gigapascal to Attopascal
1e-27 GPa × 1e+27 = 1 aPa
1e-27 gigapascals = 1 attopascal.
attopascals = gigapascals × 1e+27
For a page dedicated to this direction, see Gigapascal to Attopascal.
Understanding the Attopascal (aPa)
Attopascal is 1e-18 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 attopascal?
1 attopascal equals 1e-27 gigapascals, using the exact defined conversion factor rather than an estimate.
How do I convert attopascal to gigapascal?
Multiply the attopascal value by 1e-27. The converter above does this instantly to whatever precision you set.
How do I convert gigapascal back to attopascal?
Use the reverse factor: 1 gigapascal equals 1e+27 attopascals. You can also use the swap control in the converter above to flip the direction instantly.
What is a attopascal?
Attopascal (aPa) is a unit of pressure.
What is a gigapascal?
Gigapascal (GPa) is a unit of pressure.
Is the attopascal to gigapascal conversion exact?
Yes. Both attopascal and gigapascal are defined by fixed standards rather than physical artifacts, so the factor of 1e-27 used above is exact to as many digits as you choose to display.