UnitConPSI to Bar Converter
Convert PSI to bar for tire pressure, compressed air, and workshop tools. This conversion bridges the US customary pressure unit (PSI) with the metric bar used on European tire valves, compressors, and pressure gauges.
Formula
Multiply PSI by 0.0689476 to get bar. To reverse, divide bar by 0.0689476 to get PSI.
Quick reference
| Pound per Square Inch (psi) | Bar (bar) |
|---|---|
| 20 | 1.378951 |
| 25 | 1.723689 |
| 30 | 2.068427 |
| 32 | 2.206322 |
| 35 | 2.413165 |
| 36 | 2.482113 |
| 40 | 2.757903 |
| 45 | 3.102641 |
| 50 | 3.447379 |
| 100 | 6.894757 |
About these units
Pound per Square Inch
PSI (pounds per square inch) derives from the avoirdupois pound and the square inch. It is the standard pressure unit in the US for tires, pneumatic tools, and hydraulic systems.
Bar
The bar (100,000 Pa) was introduced in 1909 as a convenient unit close to atmospheric pressure (1 atm ≈ 1.013 bar). It is the standard pressure unit in European tire labeling and most engineering equipment outside the US.
Frequently asked questions
32 × 0.0689476 ≈ 2.21 bar — a typical car tire pressure.
2 ÷ 0.0689476 ≈ 29.0 PSI.
Most cars recommend 30-36 PSI (2.07-2.48 bar). Always check your vehicle's door placard for the specific value.