How do you convert psi to terapascals?

To convert psi (psi) to terapascals (TPa), multiply the pressure in psi by 6.894757e-9 (terapascals = psi × 6.894757e-9).

What is 5 psi in terapascals?

5 psi (5 psi) is equal to 3.447379e-8 terapascals (3.447379e-8 TPa).

Which is larger, 1 pounds per square inch (psi) or 1 terapascal (TPa)?

One terapascal (TPa) is larger than one pounds per square inch (psi). Specifically, 1 TPa equals 145,037,737.73021683 psi, while 1 psi is 6.894757e-9 TPa.

How do I convert back from terapascals (TPa) to psi (psi)?

To reverse the calculation from TPa to psi, multiply your terapascal value by the inverse factor 145,037,737.73021683 (or divide by 6.894757e-9). 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 TPa results to?

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

PSI to Terapascals Converter

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

Terapascals to PSI (TPa → psi)

Convert PSI to Terapascals

Enter a value in psi (psi) to convert to terapascals (TPa).

Value (psi)

From

Result

•

3.447379e-8terapascals

5 psi = 3.447379e-8 TPa

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 Terapascal Conversion Table

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

PSI (psi)	Terapascals (TPa)
1 psi	6.894757e-9 TPa
10 psi	0.000000069 TPa
100 psi	0.000000689 TPa
1,000 psi	0.000006895 TPa
10,000 psi	0.000068948 TPa
100,000 psi	0.000689476 TPa
1,000,000 psi	0.0068948 TPa
5,000,000 psi	0.0344738 TPa
10,000,000 psi	0.0689476 TPa
25,400,000 psi	0.1751268 TPa

How to Convert PSI to Terapascals

To convert psi to terapascals, multiply the pressure by the following conversion ratio: 6.894757e-9 terapascals/pounds per square inch.

Since one pounds per square inch is equal to 6.894757e-9 terapascals, you can use this simple formula to convert:

terapascals = psi × 6.894757e-9

The pressure in terapascals is equal to the pressure in psi multiplied by 6.894757e-9.

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

terapascals = (5 psi × 6.894757e-9) = 0.000000034 TPa

How Many Terapascals Are in a Pounds per Square Inch?

There are 6.894757e-9 terapascals in a pounds per square inch, which is why we use this value in the formula above.

1 psi = 6.894757e-9 TPa|1 TPa = 145,037,737.7302168 psi

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

PSI and terapascals 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 Terapascal?

A terapascal is a unit of pressure equal to 1e+12 pascals (Pa), the base unit for pressure. Equal to 10¹² Pascals. [2]

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

In the metric system, "tera" is the standard SI prefix for trillions, or 10¹². This makes the terapascal (TPa) a convenient decimal multiple of the pascal (Pa).

In practice, terapascals (TPa) 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 terapascals in our Pressure Converter.

When converting pressure between psi (psi) and terapascals (TPa), keep full floating-point precision (1 psi = 6.894757e-9 TPa; 1 TPa = 145,037,737.7302168 psi) during intermediate calculations and round only the final terapascal figure to match your instrument tolerance.

More Pounds per Square Inch & Terapascal Conversions

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

Convert from PSI

Convert to Terapascals

Frequently Asked Questions

There are 6.894757e-9 terapascals (TPa) in 1 pounds per square inch (psi). Conversely, 1 terapascal (TPa) is equal to 145,037,737.73021683 psi (psi).

Pressure Converter

Quick Info

Direct Factor: 1 pounds per square inch (psi) equals 6.894757e-9 terapascals (TPa).
Inverse Factor: 1 terapascal (TPa) equals 145,037,737.73021683 psi (psi).
Formula: terapascals = psi × 6.894757e-9.
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).

Terapascal (TPa)

Equal to 10¹² Pascals.

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 Terapascals (TPa)
NIST SP 811 Standard
[2]
NIST CUU (Derived SI Unit: Pascal (Pa))·Unit Specifications: Pounds per Square Inch (psi) & Terapascal (TPa)
NIST CUU Specification
[3]
BIPM (SI Brochure (9th Ed.) — Mechanics)·Conversion Factors & Mathematical Basis (psi to TPa)
BIPM Reference

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