How many micropascals are in 1 psi?

1 psi equals 6,894,757,293 micropascals, using the exact defined conversion factor rather than an estimate.

How do I convert psi to micropascal?

Multiply the psi value by 6894757293. The converter above does this instantly to whatever precision you set.

How do I convert micropascal back to psi?

Use the reverse factor: 1 micropascal equals 1.450377e-10 psi. You can also use the swap control in the converter above to flip the direction instantly.

What is a micropascal?

Micropascal (uPa) is a unit of pressure.

Is the psi to micropascal 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 Micropascals 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 Micropascals

PSI and Micropascal 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

micropascals = psi × 6894757293.17

This factor comes from each unit's defined relationship to the category's base unit: 1 psi equals 6894.75729317 base units, and 1 micropascal equals 0.000001 base units, so dividing one by the other gives the direct psi-to-micropascal factor of 6894757293.17.

Simple example

1 psi × 6894757293 = 6,894,757,293 uPa

1 psi = 6,894,757,293 micropascals.

Real-world example

35 psi × 6894757293 = 241,316,505,300 uPa

35 psi = 241,316,505,300 micropascals.

Conversion table

PSI (psi)	Micropascal (uPa)
1 psi	6,894,757,293 uPa
5 psi	34,473,786,470 uPa
10 psi	68,947,572,930 uPa
25 psi	172,368,932,300 uPa
50 psi	344,737,864,700 uPa
100 psi	689,475,729,300 uPa

Reverse conversion: Micropascal to PSI

1 uPa × 1.450377e-10 = 1.450377e-10 psi

1 micropascal = 1.450377e-10 psi.

psi = micropascals × 1.450377e-10

For a page dedicated to this direction, see Micropascal 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 Micropascal (uPa)

Micropascal is 0.000001 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 Micropascals Converter — psi to uPa

Pressure Converter