Gigapascal to Psi Converter
Enter the value that you want to convert gigapascal (GPa) to psi or psi to gigapascal.
1 gigapascal = 145037.7377295 psi
Formula: psi = gigapascal value × 145037.7377295
gigapascal to psi
10 gigapascal = 1450377.37730 psi
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Converting Gigapascal to Psi
About the Gigapascal
Gigapascal (GPa) is a unit of pressure measurement. 1 gigapascal is equal to 145037.7377295 psi.
What is Psi?
Psi (psi) is a unit of pressure measurement. 1 psi is equal to 0.0000069 gigapascal.
Pressure Units Across Industries
Pressure measurements vary dramatically by industry. Meteorologists report in millibars or hectopascals, tire shops use PSI, scuba divers think in atmospheres or bar, vacuum engineers work in torr, and hydraulic systems specify in megapascals. A single industrial plant might encounter all these units across different equipment manuals, safety datasheets, and regulatory standards from different countries.
gigapascal to psi metric conversion table
| 0.01 GPa | = | 1450.37738 psi |
| 0.1 GPa | = | 14503.77377 psi |
| 1 GPa | = | 145037.73773 psi |
| 2 GPa | = | 290075.47546 psi |
| 3 GPa | = | 435113.21319 psi |
| 4 GPa | = | 580150.95092 psi |
| 5 GPa | = | 725188.68865 psi |
| 6 GPa | = | 870226.42638 psi |
| 7 GPa | = | 1015264.16411 psi |
| 8 GPa | = | 1160301.90184 psi |
| 9 GPa | = | 1305339.63957 psi |
| 10 GPa | = | 1450377.37730 psi |
| 11 GPa | = | 1595415.11502 psi |
| 12 GPa | = | 1740452.85275 psi |
| 13 GPa | = | 1885490.59048 psi |
| 14 GPa | = | 2030528.32821 psi |
| 15 GPa | = | 2175566.06594 psi |
| 16 GPa | = | 2320603.80367 psi |
| 17 GPa | = | 2465641.54140 psi |
| 18 GPa | = | 2610679.27913 psi |
| 19 GPa | = | 2755717.01686 psi |
| 20 GPa | = | 2900754.75459 psi |
| 30 GPa | = | 4351132.13189 psi |
| 40 GPa | = | 5801509.50918 psi |
| 50 GPa | = | 7251886.88648 psi |
| 60 GPa | = | 8702264.26377 psi |
| 70 GPa | = | 10152641.64107 psi |
| 80 GPa | = | 11603019.01836 psi |
| 90 GPa | = | 13053396.39566 psi |
| 100 GPa | = | 14503773.77295 psi |
| 200 GPa | = | 29007547.54591 psi |
| 300 GPa | = | 43511321.31886 psi |
| 400 GPa | = | 58015095.09182 psi |
| 500 GPa | = | 72518868.86477 psi |
| 600 GPa | = | 87022642.63773 psi |
| 700 GPa | = | 101526416.41068 psi |
| 800 GPa | = | 116030190.18363 psi |
| 900 GPa | = | 130533963.95659 psi |
| 1000 GPa | = | 145037737.72954 psi |
How to Convert Gigapascal to Psi?
We can convert gigapascal to psi by using an example.
Example:
Convert 20 Gigapascal to Psi?
We know 1 Gigapascal = 145037.7377295 psi; 1 Psi = 0.0000069 gigapascal.
20 gigapascal = ___psi
20 × 145037.7377295 = 2900754.75459 psi (we know 1 gigapascal = 145037.7377295 psi)
Answer:
20 gigapascal = 2900754.75459 psi
How to Convert GPa to PSI (Step-by-Step)
Converting gigapascals to PSI is necessary when comparing international materials data (Young's modulus, hardness) with US engineering specifications. The conversion factor is 1 GPa = 145,038 PSI.
- Write down the value in gigapascals (GPa).
- Multiply the GPa value by 145,038.
- The result is the equivalent value in PSI.
- For quick estimation, multiply by 145,000 (error < 0.03%).
Common GPa to PSI Conversions
Material properties and extreme pressures converted from GPa to US PSI values.
| Gigapascal | Psi |
|---|---|
| 0.01 GPa | 1,450 PSI |
| 0.1 GPa | 14,504 PSI |
| 1 GPa | 145,038 PSI |
| 10 GPa | 1,450,380 PSI |
| 70 GPa | 10,152,660 PSI |
| 200 GPa | 29,007,600 PSI |
| 400 GPa | 58,015,200 PSI |
| 1220 GPa | 176,946,360 PSI |
Solved Examples: GPa to PSI
Question 1: A titanium alloy has Young's modulus of 114 GPa. Express in PSI for a US aerospace specification.
Solution:
Modulus in PSI = 114 GPa × 145,038
= 16,534,332 PSI
Answer: 114 GPa = 16,534,332 PSI ≈ 16.5 × 10⁶ PSI (16.5 Msi) — typical for Ti-6Al-4V.
Question 2: Carbon fiber composite has a modulus of 230 GPa. Convert to PSI.
Solution:
Modulus in PSI = 230 × 145,038
= 33,358,740 PSI
Answer: 230 GPa = 33.4 × 10⁶ PSI (33.4 Msi) — stiffer than steel.
Question 3: A geology paper reports lithostatic pressure of 4.5 GPa at 150 km depth. Express in PSI.
Solution:
Pressure in PSI = 4.5 × 145,038
= 652,671 PSI
Answer: 4.5 GPa = 652,671 PSI — far beyond any engineered pressure vessel.
Practice Questions: GPa to PSI
Try solving these on your own to test your understanding:
- Convert 200 GPa (steel E) to PSI. (Answer: 29,007,600 PSI)
- Aluminum modulus is 69 GPa. Express in PSI. (Answer: 10,007,622 PSI)
- Convert 3 GPa to PSI. (Answer: 435,114 PSI)
- A ceramic has E = 300 GPa. What is this in PSI? (Answer: 43,511,400 PSI)
- Convert 0.5 GPa to PSI. (Answer: 72,519 PSI)
Elastic Modulus: The Primary GPa-to-PSI Application
Young's modulus (E) is the most common property expressed in GPa internationally and "Msi" (million PSI) in the US. Key benchmarks: polymers 0.1-5 GPa (14.5-725 ksi); wood 8-15 GPa (1.2-2.2 Msi); concrete 20-40 GPa (2.9-5.8 Msi); aluminum alloys 69-73 GPa (10.0-10.6 Msi); steel 190-210 GPa (27.5-30.5 Msi); carbon fiber 230-400 GPa (33.4-58.0 Msi); diamond 1220 GPa (177 Msi). US aerospace and mechanical engineers routinely need these conversions.
US Notation: Msi (Million PSI) for Material Stiffness
Since GPa-to-PSI produces millions, US engineers use "Msi" (million PSI) for modulus values: steel E = 29 Msi, aluminum E = 10.5 Msi, titanium E = 16.5 Msi. To convert GPa to Msi directly: divide GPa by 6.895 (since 1 GPa = 0.145038 Msi ≈ GPa/6.895). So 200 GPa ÷ 6.895 = 29.0 Msi. This shortcut avoids dealing with numbers in the tens of millions.
Key Takeaways
- Multiply GPa by 145,038 to get PSI.
- Steel modulus benchmark: 200 GPa = 29,000,000 PSI = 29 Msi.
- For Msi (million PSI): divide GPa by 6.895.
- US engineers express elastic modulus in Msi rather than raw PSI.
- Aluminum: 70 GPa ≈ 10 Msi; Titanium: 114 GPa ≈ 16.5 Msi.
- Geological GPa pressures convert to millions of PSI — far beyond engineering systems.
Gigapascal to Psi Conversion Formula
psi = gigapascal × 145037.7377295
1 gigapascal = 145037.7377295 psi
1 psi = 0.0000069 gigapascal
Reverse: gigapascal = psi × 0.0000069
Frequently Asked Questions
How many psi are in 1 gigapascal?
There are 145037.7377295 psi in 1 gigapascal. To convert gigapascal to psi, multiply the value by 145037.7377295.
How do I convert gigapascal to psi?
Multiply your gigapascal value by 145037.7377295 to get the equivalent in psi. For example, 5 gigapascal = 5 × 145037.7377295 = 725188.68865 psi.
How do I convert psi to gigapascal?
Multiply your psi value by 0.0000069 to get the equivalent in gigapascal. Alternatively, divide by 145037.7377295.
What is 10 gigapascal in psi?
10 gigapascal is equal to 1450377.37730 psi.
What is 100 gigapascal in psi?
100 gigapascal is equal to 14503773.77295 psi.