How many nanopascals are in 1 psi?

1 psi equals 6.894757e+12 nanopascals, using the exact defined conversion factor rather than an estimate.

How do I convert psi to nanopascal?

Multiply the psi value by 6.894757e+12. The converter above does this instantly to whatever precision you set.

How do I convert nanopascal back to psi?

Use the reverse factor: 1 nanopascal equals 1.450377e-13 psi. You can also use the swap control in the converter above to flip the direction instantly.

What is a nanopascal?

Nanopascal (nPa) is a unit of pressure.

Is the psi to nanopascal conversion exact?

Yes. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.

PSI to Nanopascals Converter

Q: What is a psi?

PSI (psi) measures pressure. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. It is classified as a US/imperial customary unit.

About Converting PSI to Nanopascals

PSI and Nanopascal both show up on pressure gauges — psi is standard on US tire and tool specifications, while bar is the everyday pressure unit across most of the rest of the world. PSI is most often used for tire pressure specifications in the us.

Formula

nanopascals = psi × 6.894757e+12

This factor comes from each unit's defined relationship to the category's base unit: 1 psi equals 6894.75729317 base units, and 1 nanopascal equals 1e-9 base units, so dividing one by the other gives the direct psi-to-nanopascal factor of 6.894757e+12.

Simple example

1 psi × 6.894757e+12 = 6.894757e+12 nPa

1 psi = 6.894757e+12 nanopascals.

Real-world example

35 psi × 6.894757e+12 = 2.413165e+14 nPa

35 psi = 2.413165e+14 nanopascals.

Conversion table

PSI (psi)	Nanopascal (nPa)
1 psi	6.894757e+12 nPa
5 psi	3.447379e+13 nPa
10 psi	6.894757e+13 nPa
25 psi	1.723689e+14 nPa
50 psi	3.447379e+14 nPa
100 psi	6.894757e+14 nPa

Reverse conversion: Nanopascal to PSI

6.894757e+12 nPa × 1.450377e-13 = 0.9999999575 psi

6.894757e+12 nanopascals = 0.9999999575 psi.

psi = nanopascals × 1.450377e-13

For a page dedicated to this direction, see Nanopascal to PSI.

Understanding the PSI

PSI (psi) measures pressure. PSI (pounds-force per square inch) equals exactly 6,894.757293168 pascals. It is classified as a US/imperial customary unit.

Where it's used: United States (standard pressure unit for tires, tools, and plumbing)

Uses of the PSI today

Tire pressure specifications in the US
Hydraulic and pneumatic system ratings
Plumbing, compressed-air tools, and industrial equipment ratings

History of the PSI

PSI is a derived unit from the pound-force and the inch, both themselves standardized through English and later international agreements rather than invented as a pressure unit from scratch.

It became the default pressure unit in US engineering as pound-force and inch-based measurement dominated American industry through the 19th and 20th centuries, and it remains in everyday use for tires and tools even as most other measurements in the US context stay imperial.

Historical origin. PSI was not the invention of a single named person; it developed through the process described above.

Understanding the Nanopascal (nPa)

Nanopascal is 1e-9 pascal units.

PSI — sources

NIST Special Publication 811 — Guide for the Use of the International System of Units — Documents conversion factors for psi and other US customary pressure units.

PSI to Nanopascals Converter — psi to nPa

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