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Pascal to PSI Converter
↔ Convert psi to Pa instead

Common Conversions

Pa psi
100 0.0145
500 0.07252
1000 0.14504
5000 0.72519
10000 1.45038
50000 7.25189
100000 14.504
101325 14.696
200000 29.008
500000 72.519
1000000 145.038
10000000 1450.38

Why this conversion matters in chemistry

Microfluidic-channel pressure-drop math brings this up often. A 50 kPa channel drop across a PDMS lab on a chip is 7.25 psi, which is the inlet-pressure regulator targets when validating a flow-rate model from Hagen-Poiseuille analysis. The constant of 1.45038 × 10⁻⁴ psi per Pa comes from 1 psi = 6894.76 Pa, fixed through the international avoirdupois pound (4.4482 N) divided by the square inch (645.16 mm²). The job is closing the gap between SI-based research data and US-customary pneumatic equipment.

Formula

psi = Pa × 0.000145038

Worked Examples

101325 Pa = 14.696 psi

Standard atmospheric pressure expressed in both unit systems.

1000 Pa = 0.145 psi

About a small gauge pressure on a low-range manometer.

200000 Pa = 29.008 psi

About 2 bar — the pressure inside a sealed reactor at moderate buildup.

500000 Pa = 72.519 psi

About a high-pressure reaction condition for catalytic chemistry.

Frequently Asked Questions

How do I convert Pa to psi?
Multiply by 0.000145038. So 101,325 Pa becomes 14.696 psi — standard atmospheric pressure. The factor is exact through the international pound and inch definitions.
When do chemists need Pa to psi?
Translating pressure specs from SI-based literature into US-customary industrial equipment ratings, or interpreting safety data sheets that list pressures in mixed units. The conversion is routine in any pressurized-reaction or pneumatic-control context.
How many pascals in 1 psi?
Exactly 6894.76 Pa per psi. The pascal is a small pressure unit, so SI-side numbers tend to be large compared to the psi equivalents — about 7000:1.