Convert Gigapascals to Inches of Mercury (GPa to inHg)
1 gigapascal (GPa) = 295299.833 inches of mercury (inHg). 1 inHg = 0.00000338638864 GPa. Example: 15 GPa = 15 × 295299.833 = 4429497.495 inHg.
Also searched as gigapascals to inHg, gigapascals in inHg, gigapascals into inches of mercury, GPa to inHg, GPa in inches of mercury, GPa into inch of mercury, gigapascal to inch of mercury, GPa to inches of mercury converter and how many inches of mercury in a gigapascal.
1 GPa = 295299.833 inHg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigapascal to inch of mercury converter to paste a column from Excel.
How to Convert Gigapascal to Inch of Mercury
- 1 GPa = 295299.833 inHg
- 1 inHg = 0.00000338638864 GPa
- Example: convert 15 GPa to inHg: 15 GPa = 15 × 295299.833 inHg = 4429497.495 inHg
Reference conditions. inHg: Conventional mercury column: ρ = 13 595.1 kg/m³ and gₙ = 9.80665 m/s² (≈ mercury at 0 °C / 32 °F).
Formula
inHg = GPa × 295299.8330101
Derivation from SI units:
- 1 GPa = 10⁹ Pa = 1000 MPa = 1 kN/mm²
- 1 inHg = 13 595.1 kg/m³ × 9.80665 m/s² × 0.0254 m = 3386.388640341 Pa
- 1 GPa = 1000000000 Pa ÷ 3386.388640341 Pa per inHg = 295299.8330101 inHg
Both units are defined exactly, so the factor is exact. Gigapascal definition: gigapascal; Inch of Mercury definition: inch of mercury.
Worked examples
- A reading of 10 GPa converts to 2952998.33 inHg.
10 GPa × 295299.833 = 2952998.33 inHg - A value of 190 GPa is 56106968.27 inHg.
190 GPa × 295299.833 = 56106968.27 inHg
Gigapascal to Inch of Mercury conversion table
| Gigapascals (GPa) | Inches of Mercury (inHg) |
|---|---|
| 0.5 GPa | 147649.9165 inHg |
| 1 GPa | 295299.833 inHg |
| 2 GPa | 590599.666 inHg |
| 3 GPa | 885899.499 inHg |
| 5 GPa | 1476499.165 inHg |
| 10 GPa | 2952998.33 inHg |
| 45 GPa | 13288492.49 inHg |
| 70 GPa | 20670988.31 inHg |
| 110 GPa | 32482981.63 inHg |
| 117 GPa | 34550080.46 inHg |
| 190 GPa | 56106968.27 inHg |
| 200 GPa | 59059966.6 inHg |
| 210 GPa | 62012964.93 inHg |
| 400 GPa | 118119933.2 inHg |
| 1000 GPa | 295299833 inHg |
Where it's used
Gigapascals are used for young's modulus and shear modulus of metals, ceramics and composites, while inches of mercury appear in aircraft altimeter settings (standard 29.92 inHg). 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 inch of mercury | 295299.833 inHg |
| gigapascal to pascal | 1000000000 Pa |
| gigapascal to kilopascal | 1000000 kPa |
| gigapascal to ksi | 145.0377377 ksi |
| 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 |
Show 12 more units
| gigapascal to inch of water | 4014630.76 inH₂O |
|---|---|
| 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 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 inches of mercury are in 1 gigapascal?
1 GPa = 295299.833 inHg.
How do I convert gigapascals to inches of mercury?
Multiply the value in GPa by 295299.833. For example, 15 GPa × 295299.833 = 4429497.495 inHg.
Is the GPa to inHg 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, "inch of mercury, conventional (inHg)".
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 Inches of Mercury (GPa to inHg). Retrieved October 25, 2026, from https://scientificconverters.com/pressure/gigapascal-to-inch-of-mercury/
IEEE
Scientific Converters, "Convert Gigapascals to Inches of Mercury (GPa to inHg)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/pressure/gigapascal-to-inch-of-mercury/