PSI to Bar Converter
Convert PSI to bar and bar to PSI instantly.
PSI to Bar – Tire Pressure Quick Reference
| PSI (lbf/in²) | Bar |
|---|---|
| 30 psi | 2.0684 bar |
| 32 psi | 2.2063 bar |
| 35 psi | 2.4132 bar |
| 40 psi | 2.7579 bar |
| 100 psi | 6.8948 bar |
The PSI to Bar Conversion Factor
PSI (pounds per square inch) is a unit of pressure used widely in the United States and the United Kingdom, while the bar is a metric unit of pressure roughly equal to atmospheric pressure at sea level. One bar is defined as exactly 100,000 pascals, which makes the conversion between the two units a precise mathematical relationship.
- 1 psi = 0.0689475729 bar
- 1 bar ≈ 14.5037738 psi
- Convert PSI to bar: multiply by 0.0689475729
- Convert bar to PSI: multiply by 14.5037738
Common Uses
Converting between PSI and bar is a frequent task whenever pressure readings cross between metric and imperial measurement systems.
- Tire pressure: Vehicle tire pressures are quoted in PSI in the US but in bar across much of Europe, so quick conversions help you inflate tires correctly.
- Scuba diving: Cylinder and regulator pressures are commonly given in bar internationally and in PSI in the US, making conversion essential when comparing equipment specifications.
- HVAC and refrigeration: System pressures, gauges, and datasheets may use either unit, so engineers and technicians convert between them regularly.