Convert Gigapascals to ksi (GPa to ksi)
1 gigapascal (GPa) = 145.0377377 ksi. 1 ksi = 0.006894757293 GPa. Example: 15 GPa = 15 × 145.0377377 = 2175.566066 ksi.
Also searched as gigapascals to ksi, gigapascals in ksi, gigapascals into ksi, GPa to ksi, GPa in ksi, GPa into ksi, gigapascal to ksi, GPa to ksi converter and how many ksi in a gigapascal.
1 GPa = 145.0377377 ksi
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigapascal to ksi converter to paste a column from Excel.
How to Convert Gigapascal to ksi
- 1 GPa = 145.0377377 ksi
- 1 ksi = 0.006894757293 GPa
- Example: convert 15 GPa to ksi: 15 GPa = 15 × 145.0377377 ksi = 2175.566066 ksi
Formula
ksi = GPa × 145.0377377302
Derivation from SI units:
- 1 GPa = 10⁹ Pa = 1000 MPa = 1 kN/mm²
- 1 ksi = 1000 psi = 1 kip/in² = 6.894757293168 MPa
- 1 GPa = 1000000000 Pa ÷ 6894757.293168 Pa per ksi = 145.0377377302 ksi
Both units are defined exactly, so the factor is exact. Gigapascal definition: gigapascal; ksi definition: ksi.
Worked examples
- A reading of 10 GPa converts to 1450.377377 ksi.
10 GPa × 145.0377377 = 1450.377377 ksi - A value of 190 GPa is 27557.17017 ksi.
190 GPa × 145.0377377 = 27557.17017 ksi
Gigapascal to ksi conversion table
| Gigapascals (GPa) | ksi |
|---|---|
| 0.5 GPa | 72.51886887 ksi |
| 1 GPa | 145.0377377 ksi |
| 2 GPa | 290.0754755 ksi |
| 3 GPa | 435.1132132 ksi |
| 5 GPa | 725.1886887 ksi |
| 10 GPa | 1450.377377 ksi |
| 45 GPa | 6526.698198 ksi |
| 70 GPa | 10152.64164 ksi |
| 110 GPa | 15954.15115 ksi |
| 117 GPa | 16969.41531 ksi |
| 190 GPa | 27557.17017 ksi |
| 200 GPa | 29007.54755 ksi |
| 210 GPa | 30457.92492 ksi |
| 400 GPa | 58015.09509 ksi |
| 1000 GPa | 145037.7377 ksi |
Where it's used
Gigapascals are used for young's modulus and shear modulus of metals, ceramics and composites, while ksi appear in yield and tensile strength in ASTM and ASME material specifications. Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.
Gigapascal to other pressure units
| Conversion | 1 GPa equals |
|---|---|
| gigapascal to ksi | 145.0377377 ksi |
| gigapascal to pascal | 1000000000 Pa |
| gigapascal to kilopascal | 1000000 kPa |
| gigapascal to kilogram-force per square centimetre | 10197.16213 kgf/cm² |
| gigapascal to psi | 145037.7377 psi |
| gigapascal to bar | 10000 bar |
| gigapascal to millimeter of mercury | 7500615.758 mmHg |
| gigapascal to inch of water | 4014630.76 inH₂O |
Show 12 more units
| gigapascal to atmosphere | 9869.232667 atm |
|---|---|
| gigapascal to megapascal | 1000 MPa |
| gigapascal to newton per square millimetre | 1000 N/mm² |
| gigapascal to kilogram-force per square millimetre | 101.9716213 kgf/mm² |
| gigapascal to millibar | 10000000 mbar |
| gigapascal to torr | 7500616.827 Torr |
| gigapascal to millimeter of water | 101971621.3 mmH₂O |
| gigapascal to centimeter of water | 10197162.13 cmH₂O |
| gigapascal to inch of mercury | 295299.833 inHg |
| gigapascal to decibar | 100000 dbar |
| gigapascal to inch of water (60 °F) | 4018646.52 inH₂O (60 °F) |
| gigapascal to barye | 10000000000 Ba |
Frequently asked questions
How many ksi are in 1 gigapascal?
1 GPa = 145.0377377 ksi.
How do I convert gigapascals to ksi?
Multiply the value in GPa by 145.0377377. For example, 15 GPa × 145.0377377 = 2175.566066 ksi.
Is the GPa to ksi conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- 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, "kip per square inch (ksi)".
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 Gigapascals to ksi (GPa to ksi). Retrieved October 25, 2026, from https://scientificconverters.com/pressure/gigapascal-to-ksi/
IEEE
Scientific Converters, "Convert Gigapascals to ksi (GPa to ksi)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/gigapascal-to-ksi/