Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| Pa | Pascal | 100000 |
| kPa | Kilopascal | 100 |
| atm | Atmosphere | 0.98692327 |
| psi | PSI | 14.503768 |
| Torr | Torr / mmHg | 750.06376 |
| inHg | Inch of Mercury | 29.529971 |
Formula: PSI = Bar × 14.5
Multiply any bar value by 14.5 to get psi.
Reverse: Bar = PSI × 0.06895
Common bar values — factor: 1 bar = 14.5 psi
| Bar (bar) | PSI (psi) | Context |
|---|---|---|
| 0.001 bar | 0.0145 psi | 0.1 kPa |
| 0.01 bar | 0.145 psi | 1 kPa |
| 0.1 bar | 1.45 psi | 10 kPa |
| 1 bar | 14.5 psi | 100 kPa / ~1 atm |
| 1.013 bar | 14.7 psi | 1 standard atm |
| 2 bar | 29.01 psi | 29 psi / car tire |
| 5 bar | 72.52 psi | 72 psi |
| 10 bar | 145 psi | 145 psi |
| 100 bar | 1,450 psi | 1,450 psi |
| 200 bar | 2,901 psi | Scuba tank |
| 300 bar | 4,351 psi | High-pressure system |
| 500 bar | 7,252 psi | 5,000 psi |
| 1,000 bar | 1.45e+04 psi | 10,000 psi |
| 0.06895 bar | 1 psi | 1 psi |
| 0.001333 bar | 0.01933 psi | 1 mmHg |
Bar × 14.504 = psi. Round to × 14.5 for quick estimates.
Multiply bar by 14.5 — easy mental calculation.
2 bar = 29 psi (tire), 200 bar = 2,901 psi (scuba).
Monitors dive cylinder pressure in bar — standard in most of the world (200–300 bar).
Reads surface pressure maps in millibar (1 mbar = 0.001 bar) for weather forecasting.
Designs European hydraulic systems — pumps and actuators are rated in bar.
Controls fermentation vessel pressure (1–3 bar) and carbonation pressures in bar.
Specifies pipeline operating pressures and safety relief settings in bar.
Monitors tire pressure and boost pressure on turbocharged engines in bar.
The bar is a metric unit of pressure equal to exactly 100,000 pascals — very close to standard atmospheric pressure (1 atm = 1.01325 bar). It was introduced in 1909 and is widely used in Europe for weather forecasting, diving, and industrial applications.
Scuba diving cylinders are filled to 200–300 bar. Automotive tire pressure gauges often display in bar across Europe. Industrial compressors and hydraulic systems are commonly rated in bar.
Interesting fact: The millibar (mbar = hPa) is the standard unit for atmospheric pressure in meteorology worldwide. Standard sea-level atmospheric pressure is 1013.25 mbar.
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 bar 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 bar = 72.52 psi and 10 bar = 145 psi. For the reverse: 1 psi = 0.06895 bar. The exact factor is 1 bar = 14.5 psi.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.