Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| Pa | Pascal | 6894.76 |
| kPa | Kilopascal | 6.89476 |
| bar | Bar | 0.0689476 |
| atm | Atmosphere | 0.068045991 |
| Torr | Torr / mmHg | 51.715096 |
| inHg | Inch of Mercury | 2.0360207 |
Formula: Bar = PSI × 0.06895
Multiply any psi value by 0.06895 to get bar.
Reverse: PSI = Bar × 14.5
Common psi values — factor: 1 psi = 0.06895 bar
| PSI (psi) | Bar (bar) | Context |
|---|---|---|
| 0.1 psi | 0.006895 bar | Very low gauge |
| 1 psi | 0.06895 bar | Low tire |
| 5 psi | 0.3447 bar | Bike inner tube low |
| 10 psi | 0.6895 bar | Low hydraulic |
| 14.7 psi | 1.013 bar | 1 atm |
| 20 psi | 1.379 bar | Soft tire |
| 30 psi | 2.068 bar | Car tire low |
| 35 psi | 2.413 bar | Car tire normal |
| 60 psi | 4.137 bar | Truck tire |
| 100 psi | 6.895 bar | Medium hydraulic |
| 150 psi | 10.34 bar | High hydraulic |
| 1,000 psi | 68.95 bar | Industrial |
| 3,000 psi | 206.8 bar | Scuba cylinder |
| 6,000 psi | 413.7 bar | High-pressure cylinder |
| 1.5e+04 psi | 1,034 bar | Waterjet |
PSI × 0.06895 = bar. Round to × 0.069 for quick estimates.
Divide psi by 14.5 to get bar — accurate to 0.2%.
30 psi ≈ 2 bar (tire), 100 psi ≈ 6.9 bar, 3000 psi ≈ 207 bar (scuba).
Inflates and checks car, truck, and bicycle tires to specified psi pressures.
Specifies refrigerant pressures and system test pressures in psi for US equipment.
Designs hydraulic systems rated in psi for American industrial machinery.
Monitors tank pressure (3,000 psi fill) and reserve pressure on US-spec gauges.
Specifies pipe pressure ratings and test pressures in psi for US plumbing codes.
Checks oil pressure (35–65 psi), coolant pressure, and brake line pressure in psi.
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.
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.
Converting psi to bar 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 psi = 0.3447 bar and 10 psi = 0.6895 bar. For the reverse: 1 bar = 14.5 psi. The exact factor is 1 psi = 0.06895 bar.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.