Verification: factors follow standard unit definitions; round for display only.

Pascal to psi

Convert Pa to psi when a sensor export, CFD boundary condition, or SI lab report lists pascals but a US tire placard, scuba fill log, or hydraulic nameplate expects pounds per square inch.

The pascal (Pa, N/m²) is the SI unit of pressure. Pounds per square inch (psi, lbf/in²) is the US customary unit. This catalog defines 1 psi = 6,894.757293168 Pa — wired as PSI: 6894.757293168 with Pascal: 1 as the pressure base. The conversion is a pure scale factor with no offset.

psi = Pa ÷ 6,894.757293168  ·  equivalently   psi = Pa × 0.000145037737730

For kilopascals, convert to psi via pascals or use psi ≈ kPa × 0.145038. Round only for display; carry the full constant through compliance calculations and relief-valve settings.

Step-by-step conversion (worked example)

Convert 101,325 Pa to psi — standard sea-level atmospheric pressure:

1. Write the formula: psi = Pa ÷ 6,894.757293168
2. Divide: 101,325 ÷ 6,894.757293168 = 14.6959 psi
3. Round for display: 14.7 psi

Second worked example (220,632 Pa tire pressure)

Convert 220,632 Pa — equivalent to 32 psi, a common cold tire reading:

1. 220,632 ÷ 6,894.757293168 = 32.000 psi
2. Cross-check: 32 × 6,894.757293168 = 220,632 Pa exactly

Quick mental estimate (no calculator)

Divide pascals by 6,900 for a quick psi estimate (~0.07% high). Example: 689,475 Pa → about 100 psi (exact: 99.99 psi). For kPa, multiply by 0.145: 100 kPa ≈ 14.5 psi.

Pascal to psi conversion chart

Where pascal → psi comes up

• Automotive & tires: TPMS sensors and EU datasheets export Pa or kPa; US placards and shop gauges read psi. Convert before comparing cold-pressure readings across regions.
• Hydraulics & pneumatics: ISO simulation outputs in Pa; US maintenance logs and relief-valve nameplates list psi. A 20 MPa hydraulic test equals about 2,900 psi.
• Weather & altitude: Meteorological models use Pa or hPa; US aviation briefings and altimeter settings often reference psi or inHg. Sea-level ambient ≈ 101,325 Pa ≈ 14.7 psi absolute.
• Lab & calibration: Dead-weight testers and pressure transducers calibrated in SI must be reconciled with US-sourced reference gauges before issuing certificates.

Psi to pascal

Convert psi to Pa when a US tire placard, scuba fill log, or hydraulic nameplate lists pounds per square inch but your simulation, EU datasheet, or SI lab report expects pascals.

Reverse the pascal-to-psi process by multiplying psi by the same factor. Both routes are equivalent because the relationship is a pure scale factor with no additive offset.

Pa = psi × 6,894.757293168  ·  equivalently   kPa = psi × 6.894757293168

Step-by-step conversion (worked example)

Convert 32 psi to pascals — a common US tire pressure:

1. Multiply: 32 × 6,894.757293168 = 220,632 Pa
2. In kPa: 220.6 kPa

Second worked example (100 psi hydraulic line)

1. 100 × 6,894.757293168 = 689,476 Pa
2. ≈ 689.5 kPa or 6.895 bar

Quick mental estimate (reverse direction)

Multiply psi by 6,900 for a quick Pa estimate. Example: 14.7 psi → about 101,400 Pa (exact: 101,353 Pa). For kPa, multiply psi by 6.9.

Quick reference (psi → Pa)

Gauge vs absolute, common mistakes, and related tools

The pascal–psi factor is exact through SI definitions. Confirm gauge vs absolute notation, avoid rounded shortcuts in safety work, and keep unit symbols explicit.

Pascal vs psi at a glance

Common mistakes to avoid

• Using 6895 as an exact factor — fine for tires (~0.01% high), but use the full 6,894.757293168 for hydraulic certificates and relief-valve settings.
• Mixing gauge and absolute readings — match psig to gauge-referenced Pa and psia to absolute Pa before comparing.
• Confusing kPa with psi numerically — 100 kPa ≈ 14.5 psi, not 100 psi.
• Rounding too early — carry full precision through multi-step calculations and round only the final displayed value.

Related pressure converters

See psi to pascal, pascal to bar, bar to psi, pascal to atmosphere, and psi to bar.