Convert Atmospheres to Gigapascals (atm to GPa)
1 atmosphere (atm) = 0.000101325 gigapascals (GPa). 1 GPa = 9869.232667 atm. Example: 15 atm = 15 × 0.000101325 = 0.001519875 GPa.
Also searched as atmospheres to GPa, atmospheres in GPa, atmospheres into gigapascals, atm to GPa, atm in gigapascals, atm into gigapascal, atmosphere to gigapascal, atm to gigapascals converter and how many gigapascals in an atmosphere.
1 atm = 0.000101325 GPa
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk atmosphere to gigapascal converter to paste a column from Excel.
How to Convert Atmosphere to Gigapascal
- 1 atm = 0.000101325 GPa
- 1 GPa = 9869.232667 atm
- Example: convert 15 atm to GPa: 15 atm = 15 × 0.000101325 GPa = 0.001519875 GPa
Formula
GPa = atm × 0.000101325
or GPa = atm ÷ 9869.23266716
Derivation from SI units:
- 1 atm = 101 325 Pa (exact, by definition)
- 1 GPa = 10⁹ Pa = 1000 MPa = 1 kN/mm²
- 1 atm = 101325 Pa ÷ 1000000000 Pa per GPa = 0.000101325 GPa
Both units are defined exactly, so the factor is exact. Atmosphere definition: atmosphere; Gigapascal definition: gigapascal.
Worked examples
- A reading of 1.5 atm converts to 0.0001519875 GPa.
1.5 atm × 0.000101325 = 0.0001519875 GPa - A value of 10 atm is 0.00101325 GPa.
10 atm × 0.000101325 = 0.00101325 GPa
Atmosphere to Gigapascal conversion table
| Atmospheres (atm) | Gigapascals (GPa) |
|---|---|
| 0.001 atm | 1.01325 × 10⁻⁷ GPa |
| 0.01 atm | 0.00000101325 GPa |
| 0.1 atm | 0.0000101325 GPa |
| 0.25 atm | 0.00002533125 GPa |
| 0.5 atm | 0.0000506625 GPa |
| 1 atm | 0.000101325 GPa |
| 1.5 atm | 0.0001519875 GPa |
| 2 atm | 0.00020265 GPa |
| 2.5 atm | 0.0002533125 GPa |
| 3 atm | 0.000303975 GPa |
| 4 atm | 0.0004053 GPa |
| 5 atm | 0.000506625 GPa |
| 10 atm | 0.00101325 GPa |
| 20 atm | 0.0020265 GPa |
| 50 atm | 0.00506625 GPa |
| 100 atm | 0.0101325 GPa |
| 200 atm | 0.020265 GPa |
| 300 atm | 0.0303975 GPa |
| 1000 atm | 0.101325 GPa |
Where it's used
Atmospheres are used for chemistry and gas laws (STP and NTP conditions), while gigapascals appear in young's modulus and shear modulus of metals, ceramics and composites. Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.
Atmosphere to other pressure units
| Conversion | 1 atm equals |
|---|---|
| atmosphere to gigapascal | 0.000101325 GPa |
| atmosphere to pascal | 101325 Pa |
| atmosphere to kilopascal | 101.325 kPa |
| atmosphere to ksi | 0.01469594878 ksi |
| atmosphere to kilogram-force per square centimetre | 1.033227453 kgf/cm² |
| atmosphere to psi | 14.69594878 psi |
| atmosphere to bar | 1.01325 bar |
| atmosphere to millimeter of mercury | 759.9998917 mmHg |
Show 12 more units
| atmosphere to inch of water | 406.7824617 inH₂O |
|---|---|
| atmosphere to megapascal | 0.101325 MPa |
| atmosphere to newton per square millimetre | 0.101325 N/mm² |
| atmosphere to kilogram-force per square millimetre | 0.01033227453 kgf/mm² |
| atmosphere to millibar | 1013.25 mbar |
| atmosphere to torr | 760 Torr |
| atmosphere to millimeter of water | 10332.27453 mmH₂O |
| atmosphere to centimeter of water | 1033.227453 cmH₂O |
| atmosphere to inch of mercury | 29.92125558 inHg |
| atmosphere to decibar | 10.1325 dbar |
| atmosphere to inch of water (60 °F) | 407.1893586 inH₂O (60 °F) |
| atmosphere to barye | 1013250 Ba |
Frequently asked questions
How many gigapascals are in 1 atmosphere?
1 atm = 0.000101325 GPa.
How do I convert atmospheres to gigapascals?
Multiply the value in atm by 0.000101325, or divide it by 9869.232667. For example, 15 atm × 0.000101325 = 0.001519875 GPa.
Is the atm to GPa conversion exact?
Yes. Both units are defined exactly, and 1 atm is exactly 0.000101325 GPa.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "atmosphere, standard (atm)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Atmospheres to Gigapascals (atm to GPa). Retrieved October 25, 2026, from https://scientificconverters.com/pressure/atmosphere-to-gigapascal/
IEEE
Scientific Converters, "Convert Atmospheres to Gigapascals (atm to GPa)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/atmosphere-to-gigapascal/