Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| kPa | Kilopascal | 0.001 |
| bar | Bar | 0.00001 |
| atm | Atmosphere | 0.0000098692327 |
| psi | PSI | 0.00014503768 |
| Torr | Torr / mmHg | 0.0075006376 |
| inHg | Inch of Mercury | 0.00029529971 |
Formula: PSI = Pascal × 0.000145
Multiply any pascal value by 0.000145 to get psi.
Reverse: Pascal = PSI × 6895
Common pascal values — factor: 1 Pa = 0.000145 psi
| Pascal (Pa) | PSI (psi) | Context |
|---|---|---|
| 1 Pa | 0.000145 psi | 1 Pa — light breeze |
| 100 Pa | 0.0145 psi | 1 mbar |
| 1,000 Pa | 0.145 psi | 10 mbar |
| 1e+04 Pa | 1.45 psi | 0.1 atm |
| 101,300 Pa | 14.7 psi | 1 atm / sea level |
| 200,000 Pa | 29.01 psi | 2 bar |
| 500,000 Pa | 72.52 psi | 10 bar |
| 1,000,000 Pa | 145 psi | 10 bar |
| 10,000,000 Pa | 1,450 psi | 100 bar |
| 100,000,000 Pa | 1.45e+04 psi | 1,000 bar |
| 6,895 Pa | 1 psi | 1 psi |
| 133.3 Pa | 0.01934 psi | 1 mbar |
| 3,386 Pa | 0.4912 psi | 1 psi |
| 9.807e+04 Pa | 14.22 psi | 1 atm / sea level |
| 1.000e+09 Pa | 145,000 psi | 10,000 bar |
1 Pa = 0.000145 psi. Memorize for instant estimates.
Use 0.000145 as a quick mental multiplier.
Multiply result by 6895 to recover the original Pa value.
Measures sound pressure levels in pascals — 20 μPa is the threshold of hearing.
Measures wind load on structures and façade pressure in pascals.
Specifies air pressure differentials across filters and dampers in Pa.
Calibrates pressure instruments traceable to SI pascal standards.
Solves Navier-Stokes equations with pressure in pascals.
Controls process chamber pressure in mPa range for deposition processes.
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square meter. It was named after Blaise Pascal, the 17th-century French mathematician and physicist who studied fluid pressure. The unit was officially adopted by the International System of Units in 1971.
Pascals are used in meteorology (atmospheric pressure ~101,325 Pa), materials science (Young's modulus in GPa), and fluid mechanics. The pascal is very small — standard atmospheric pressure equals 101,325 Pa.
Interesting fact: Blaise Pascal demonstrated in 1648 that atmospheric pressure decreases with altitude by carrying a barometer up the Puy de Dôme mountain, confirming Torricelli's theory of atmospheric pressure.
PSI (pounds per square inch) is the primary pressure unit in the United States, UK, and other countries using Imperial measures. It equals the force of one pound-force applied over one square inch of area (6,894.76 Pa).
PSI is used for tire pressure (car: 30–35 psi, truck: 80–120 psi), blood pressure measurement in the US, boiler pressure ratings, and hydraulic system specifications in American engineering.
Interesting fact: The deepest ocean dive by a human (Victor Vescovo, 2019, 10,928 m) would have experienced about 15,900 psi of external pressure on the submersible hull.
Converting pascal to psi is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 Pa = 0.0007252 psi and 10 Pa = 0.00145 psi. For the reverse: 1 psi = 6895 Pa. The exact factor is 1 Pa = 0.000145 psi.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.