Convert Pascals to PSI
Pascals to psi is the conversion you need when a pressure reading is in metric pascals but the gauge or spec you're matching is in pounds per square inch. One pascal is approximately 0.000145038 psi, so the psi number always comes out much smaller — and because psi is an imperial unit, that factor is a long, rounded value rather than an exact one.
Pascals to Pounds per square inch conversion table
| Pascals (Pa) | Pounds per square inch (psi) |
|---|---|
| 1 | 0.000145 |
| 2 | 0.00029 |
| 3 | 0.000435 |
| 5 | 0.000725 |
| 10 | 0.00145 |
| 20 | 0.002901 |
| 50 | 0.007252 |
| 100 | 0.014504 |
| 500 | 0.072519 |
| 1,000 | 0.145038 |
The formula
To convert pascals to psi, multiply the pressure in pascals by 0.00014503773773020924:
psi = pascals × 0.00014503773773020924
A worked example
Say you're converting 6,895 Pa into psi:
6,895 × 0.00014503773773020924 = 1.0000352 psi
So 6,895 pascals is about 1 psi.
Why it's an approximation
The pascal is a metric unit, but psi — pounds per square inch — is built from the pound and the inch, imperial units that don't line up cleanly with the metric system. Because the underlying units don't divide evenly, the factor 0.00014503773773020924 is a long, rounded value. For a useful anchor, standard sea-level air pressure is about 101,325 Pa, which is 1 atmosphere and works out to roughly 14.7 psi.
When you'll use it
Matching a metric pressure reading against tire, tank, or hydraulic gauges marked in psi, checking equipment specs written for a US audience, and converting lab or physics figures in pascals into the psi people use day to day.
Frequently asked questions
How many psi are in a pascal?
About 0.000145038 psi. It's a rounded figure — the exact value runs on well past that many decimal places, so 0.000145038 is the practical number to use.
How many pascals make one psi?
Roughly 6,895 pascals. That's handy to remember because standard sea-level air pressure, about 101,325 Pa, works out to about 14.7 psi.
Is the pascals to psi conversion exact?
No. The pascal is metric and the psi is imperial, built on the pound and the inch, so the two don't divide evenly. The factor 0.000145038 is rounded for everyday use.