How to Convert Bar to PSI
Bar and PSI (pounds per square inch) are both units of pressure. Bar is commonly used in Europe and in technical/engineering contexts, while PSI is widely used in the US for tire pressure, pressure washers, and pneumatic systems.
The conversion factor is 1 bar = 14.5038 PSI.
The Conversion Formula
PSI = Bar ร 14.5038
Going the other direction:
Bar = PSI รท 14.5038
Step-by-Step Example
Your car tire requires 2.3 bar of pressure. What is that in PSI?
- 2.3 ร 14.5038 = 33.36 PSI (approximately 33 PSI)
Reference Table
| Bar | PSI | Context |
|---|---|---|
| 1 bar | 14.50 PSI | Approximate atmospheric pressure |
| 2 bar | 29.01 PSI | Road bicycle tire |
| 2.3 bar | 33.36 PSI | Car tire (typical) |
| 2.5 bar | 36.26 PSI | SUV tire |
| 6 bar | 87.02 PSI | Mountain bike tire |
| 10 bar | 145.04 PSI | Industrial air supply |
Atmospheric Pressure Context
Standard atmospheric pressure at sea level is 1.01325 bar, or 14.696 PSI. Weather barometers often display pressure in bar or millibars (mbar), while SCUBA diving equipment uses bar to indicate tank pressure (a full tank is typically 200โ300 bar).
Use our bar-to-PSI calculator for precise pressure conversions.