How do you convert psi to gigapascals?

To convert psi (psi) to gigapascals (GPa), multiply the pressure in psi by 0.00000689 (gigapascals = psi × 0.00000689).

What is 5 psi in gigapascals?

5 psi (5 psi) is equal to 0.00003447 gigapascals (0.00003447 GPa).

Which is larger, 1 pounds per square inch (psi) or 1 gigapascal (GPa)?

One gigapascal (GPa) is larger than one pounds per square inch (psi). Specifically, 1 GPa equals 145,037.73773021 psi, while 1 psi is 0.00000689 GPa.

How do I convert back from gigapascals (GPa) to psi (psi)?

To reverse the calculation from GPa to psi, multiply your gigapascal value by the inverse factor 145,037.73773021 (or divide by 0.00000689). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round psi to GPa results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 psi ≈ 0.00 GPa). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

PSI to Gigapascals Converter

Enter the pressure in psi below to convert it to gigapascals.

Gigapascals to PSI (GPa → psi)

Convert PSI to Gigapascals

Enter a value in psi (psi) to convert to gigapascals (GPa).

Value (psi)

From

Result

•

0.000034474gigapascals

5 psi = 0.000034474 GPa

Result updates automatically

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Equivalent Measurements Across UnitsFor 5 psi

Pascals34,473.78647 Pa

Kilopascals34.47379 kPa

Bars0.34474 bar

Atmospheres0.34023 atm

Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))

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Pounds per Square Inch to Gigapascal Conversion Table

Table showing various pounds per square inch measurements converted to gigapascals. Click any preset value or arrow to load it into the converter.

PSI (psi)	Gigapascals (GPa)
1 psi	0.000006895 GPa
10 psi	0.000068948 GPa
100 psi	0.000689476 GPa
1,000 psi	0.0068948 GPa
10,000 psi	0.0689476 GPa
100,000 psi	0.6894757 GPa
1,000,000 psi	6.8947573 GPa
5,000,000 psi	34.4737865 GPa
10,000,000 psi	68.9475729 GPa
25,400,000 psi	175.1268352 GPa

How to Convert PSI to Gigapascals

To convert psi to gigapascals, multiply the pressure by the following conversion ratio: 0.000006895 gigapascals/pounds per square inch.

Since one pounds per square inch is equal to 0.000006895 gigapascals, you can use this simple formula to convert:

gigapascals = psi × 0.000006895

The pressure in gigapascals is equal to the pressure in psi multiplied by 0.000006895.

For example, here's how to convert 5 psi to gigapascals using the formula above.

gigapascals = (5 psi × 0.000006895) = 0.000034474 GPa

How Many Gigapascals Are in a Pounds per Square Inch?

There are 0.000006895 gigapascals in a pounds per square inch, which is why we use this value in the formula above.

1 psi = 0.000006895 GPa|1 GPa = 145,037.7377302 psi

Our pounds per square inch to gigapascal calculator automatically converts your pressure measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

PSI and gigapascals are both units used to measure pressure. Keep reading to learn more about each unit.

What Is a Pounds per Square Inch?

A pounds per square inch is a unit of pressure equal to 6,894.7572932 pascals (Pa), the base unit for pressure. Imperial & US pressure unit equal to 1 pound-force per square inch (6.89476 kPa). [1]

The pounds per square inch is classified as a US customary and imperial unit of pressure. PSI can be abbreviated as psi; for example, 1 pounds per square inch can be written as 1 psi.

When working with psi (psi) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, psi (psi) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within US customary and imperial workflows, engineering documentation, and technical data sheets.

Learn more about psi in our Pressure Converter.

What Is a Gigapascal?

A gigapascal is a unit of pressure equal to 1,000,000,000 pascals (Pa), the base unit for pressure. Equal to 1,000,000,000 Pascals (1,000 MPa), used for elastic modulus of metals and diamond. [2]

The gigapascal is classified as an International System of Units (SI) unit of pressure. Gigapascals can be abbreviated as GPa; for example, 1 gigapascal can be written as 1 GPa.

In the metric system, "giga" is the standard SI prefix for billions, or 10⁹. This makes the gigapascal (GPa) a convenient decimal multiple of the pascal (Pa).

In practice, gigapascals (GPa) are widely used across large-scale industrial, bulk, and macro-level pressure specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.

Learn more about gigapascals in our Pressure Converter.

When converting pressure between psi (psi) and gigapascals (GPa), keep full floating-point precision (1 psi = 0.000006895 GPa; 1 GPa = 145,037.7377302 psi) during intermediate calculations and round only the final gigapascal figure to match your instrument tolerance.

More Pounds per Square Inch & Gigapascal Conversions

Need to calculate in the opposite direction? Use our gigapascals to psi calculator to switch your starting unit immediately. You can also explore related tools such as converting gigapascals to psi, converting psi to bars, or converting psi to kilopascals.

Convert from PSI

Convert to Gigapascals

Frequently Asked Questions

There are 0.00000689 gigapascals (GPa) in 1 pounds per square inch (psi). Conversely, 1 gigapascal (GPa) is equal to 145,037.73773021 psi (psi).

Pressure Converter

Quick Info

Direct Factor: 1 pounds per square inch (psi) equals 0.00000689 gigapascals (GPa).
Inverse Factor: 1 gigapascal (GPa) equals 145,037.73773021 psi (psi).
Formula: gigapascals = psi × 0.00000689.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Pounds per Square Inch (psi)

Imperial & US pressure unit equal to 1 pound-force per square inch (6.89476 kPa).

Gigapascal (GPa)

Equal to 1,000,000,000 Pascals (1,000 MPa), used for elastic modulus of metals and diamond.

Pascal (Pa)

SI derived unit of pressure equal to 1 Newton per square meter (N/m²).

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Pressure & Stress)
Source
[2]NIST CUU · Derived SI Unit: Pascal (Pa)
Source
[3]BIPM · SI Brochure (9th Ed.) — Mechanics
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Pressure & Stress))·Pressure Metrology Standard — PSI (psi) to Gigapascals (GPa)
NIST SP 811 Standard
[2]
NIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Pounds per Square Inch (psi) & Gigapascal (GPa)
NIST CUU Specification
[3]
BIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (psi to GPa)
BIPM Reference

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