Pascals to Psi
An instant pascals-to-psi converter, with the formula and a reference table below.
| Pascals | Psi |
|---|---|
| 1 Pa | 0.000145 psi |
| 2 Pa | 0.00029 psi |
| 3 Pa | 0.000435 psi |
| 5 Pa | 0.000725 psi |
| 10 Pa | 0.00145 psi |
| 25 Pa | 0.003626 psi |
| 50 Pa | 0.007252 psi |
| 100 Pa | 0.014504 psi |
How to use
- Enter a value in the Pascals field.
- The Psi figure appears immediately — no button to press.
- Typing in the Psi field converts back to Pascals the same way.
- Use the reference table for the values that come up most often.
Pascals to Psi formula
Converting pascals to psi is a single multiplication by 0.000145037738.
psi = Pa × 0.000145037738
Why this factor: the pascal and the pound per square inch are both defined against the pascal, so dividing one definition by the other gives 0.000145037738 directly. Both definitions are set out in full below.
To go the other way, divide by 0.000145037738 — or use the Psi to Pascals converter, which is the same calculation reversed.
Worked example
Given 32 Pa, multiplying by 0.000145037738 yields 0.004641 psi.
32 Pa × 0.000145037738 = 0.004641 psi
The converter above does this for any value you type, in either direction.
What is a pascal?
The pascal is the SI unit of pressure — one newton of force spread over one square meter.
Definition: Defined as 1 N/m². Named after Blaise Pascal.
Where it is used: Scientific and engineering pressure calculations, and weather pressure in hectopascals.
Worth knowing: A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
What is a pound per square inch?
Pounds per square inch is the standard pressure unit in the United States.
Definition: One pound-force per square inch, which is about 6,894.757 pascals.
Where it is used: US tire pressure, compressed air and hydraulic systems, and plumbing water pressure.
Pascals vs Psi
The pascal is an SI unit while the pound per square inch is a US customary unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many psi are in a pascal?
One pascal equals 0.000145037738 psi.
What is the formula to convert pascals to psi?
Multiply the number of pascals by 0.000145037738. To reverse it, divide by 0.000145037738 instead.
How do I convert psi back to pascals?
Divide by 0.000145037738, which is the same as multiplying by 6894.75729.
How many psi are in 10 pascals?
10 Pa works out to 0.00145 psi.
Is there anything to watch out for with pascals?
A single pascal is a very small pressure, which is why weather reports use hectopascals and engineering uses kilopascals.
How is the pascal defined?
Defined as 1 N/m². Named after Blaise Pascal.