Convert pascals to psi
Convert pascals to psi instantly. 1 Pa = 0.000145 psi. Formula, worked examples and a quick reference table.
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One pascal equals 0.000145 psi. To convert any number of pascals to psi, multiply by 0.00014504.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Pressure conversions are dominated by one everyday task: inflating a tyre. The United States and the United Kingdom quote psi, most of Europe uses bar, Canada and Australia use kilopascals, and the figure on the door jamb may not match the unit on the gauge. Beyond tyres, the same conversions serve weather reporting, diving, and any engineering work where a specification and an instrument were made in different markets.
pascals to psi formula
To go the other way, use pascal = psi ÷ 0.00014504.
About these units
The pascal is one newton per square metre — a very small pressure, which is why practical figures are almost always quoted in kilopascals or bar.
Pounds per square inch remains the standard for tyre pressure in the US and UK, while most of the world uses bar or kilopascals.
Pascal is also written pascals and n/m2. PSI is also written pounds per square inch and lb/in2.
Sources
- National Bureau of Standards, "Refinement of Values for the Yard and the Pound", Federal Register, 1 July 1959 — the international yard as exactly 0.9144 m and the avoirdupois pound as exactly 0.45359237 kg.
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI), 2008 edition — conversion factors for units outside the SI.
pascals to psi conversion table
| Pascal | PSI |
|---|---|
| 1 Pa | 0.000145 psi |
| 2 Pa | 0.0002901 psi |
| 3 Pa | 0.0004351 psi |
| 5 Pa | 0.0007252 psi |
| 10 Pa | 0.00145 psi |
| 20 Pa | 0.002901 psi |
| 25 Pa | 0.003626 psi |
| 50 Pa | 0.007252 psi |
| 100 Pa | 0.0145 psi |
| 250 Pa | 0.03626 psi |
| 500 Pa | 0.07252 psi |
| 1,000 Pa | 0.145 psi |
Frequently asked questions
How many psi are in a pascal? +
There are 0.000145 psi in one pascal.
What is 10 Pa in psi? +
10 Pa equals 0.00145 psi. Multiply 10 by 0.00014504.
How do I convert psi back to pascal? +
Use pascal = psi ÷ 0.00014504. The converter above handles both directions, or see our dedicated psi to pascals page.
How accurate is this pascal to psi conversion? +
The factor used is 0.0001450377, carried at full double precision. Where a unit has an exact legal definition the factor is exact rather than approximate. Rounding is applied only to the displayed result, so the answer is never a calculation done on an already-rounded number.
Is there a quick way to estimate Pa to psi in my head? +
Divide by 6,890. That is 0.06905% off the exact factor of 0.000145, which is fine for a rough figure and not for anything that has to balance.