Convert Bar to Gigapascals (bar to GPa)
1 bar = 0.0001 gigapascals (GPa). 1 GPa = 10000 bar. Example: 15 bar = 15 × 0.0001 = 0.0015 GPa.
Also searched as bar to GPa, bar in GPa, bar into gigapascals, bar in gigapascals, bar into gigapascal, bar to gigapascal, bar to gigapascals converter and how many gigapascals in a bar.
1 bar = 0.0001 GPa
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk bar to gigapascal converter to paste a column from Excel.
How to Convert Bar to Gigapascal
- 1 bar = 0.0001 GPa
- 1 GPa = 10000 bar
- Example: convert 15 bar to GPa: 15 bar = 15 × 0.0001 GPa = 0.0015 GPa
Formula
GPa = bar ÷ 10000
Derivation from SI units:
- 1 bar = 10⁵ Pa (exact, by definition)
- 1 GPa = 10⁹ Pa = 1000 MPa = 1 kN/mm²
- 1 bar = 100000 Pa ÷ 1000000000 Pa per GPa = 0.0001 GPa
Both units are defined exactly, so the factor is exact. Bar definition: bar; Gigapascal definition: gigapascal.
Worked examples
- A reading of 2 bar converts to 0.0002 GPa.
2 bar × 0.0001 = 0.0002 GPa - A value of 10 bar is 0.001 GPa.
10 bar × 0.0001 = 0.001 GPa
Bar to Gigapascal conversion table
| Bar | Gigapascals (GPa) |
|---|---|
| 0.01 bar | 0.000001 GPa |
| 0.05 bar | 0.000005 GPa |
| 0.1 bar | 0.00001 GPa |
| 0.25 bar | 0.000025 GPa |
| 0.5 bar | 0.00005 GPa |
| 1 bar | 0.0001 GPa |
| 1.01325 bar | 0.000101325 GPa |
| 1.5 bar | 0.00015 GPa |
| 2 bar | 0.0002 GPa |
| 2.5 bar | 0.00025 GPa |
| 3 bar | 0.0003 GPa |
| 4 bar | 0.0004 GPa |
| 5 bar | 0.0005 GPa |
| 6 bar | 0.0006 GPa |
| 7 bar | 0.0007 GPa |
| 8 bar | 0.0008 GPa |
| 10 bar | 0.001 GPa |
| 12 bar | 0.0012 GPa |
| 16 bar | 0.0016 GPa |
| 20 bar | 0.002 GPa |
| 25 bar | 0.0025 GPa |
| 40 bar | 0.004 GPa |
| 100 bar | 0.01 GPa |
| 200 bar | 0.02 GPa |
| 300 bar | 0.03 GPa |
Where it's used
Bar are used for compressed air and pneumatics (6–8 bar), 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.
Bar to other pressure units
| Conversion | 1 bar equals |
|---|---|
| bar to gigapascal | 0.0001 GPa |
| bar to pascal | 100000 Pa |
| bar to kilopascal | 100 kPa |
| bar to ksi | 0.01450377377 ksi |
| bar to kilogram-force per square centimetre | 1.019716213 kgf/cm² |
| bar to psi | 14.50377377 psi |
| bar to millimeter of mercury | 750.0615758 mmHg |
| bar to inch of water | 401.463076 inH₂O |
Show 12 more units
| bar to atmosphere | 0.9869232667 atm |
|---|---|
| bar to megapascal | 0.1 MPa |
| bar to newton per square millimetre | 0.1 N/mm² |
| bar to kilogram-force per square millimetre | 0.01019716213 kgf/mm² |
| bar to millibar | 1000 mbar |
| bar to torr | 750.0616827 Torr |
| bar to millimeter of water | 10197.16213 mmH₂O |
| bar to centimeter of water | 1019.716213 cmH₂O |
| bar to inch of mercury | 29.5299833 inHg |
| bar to decibar | 10 dbar |
| bar to inch of water (60 °F) | 401.864652 inH₂O (60 °F) |
| bar to barye | 1000000 Ba |
Frequently asked questions
How many gigapascals are in 1 bar?
1 bar = 0.0001 GPa.
How do I convert bar to gigapascals?
Multiply the value in bar by 0.0001, or divide it by 10000. For example, 15 bar × 0.0001 = 0.0015 GPa.
Is the bar to GPa conversion exact?
Yes. Both units are defined exactly, and 1 bar is exactly 0.0001 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, "bar".
- 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 Bar to Gigapascals (bar to GPa). Retrieved October 25, 2026, from https://scientificconverters.com/pressure/bar-to-gigapascal/
IEEE
Scientific Converters, "Convert Bar to Gigapascals (bar to GPa)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/bar-to-gigapascal/