PSI to Bar Converter
Converts psi to bar (psi to bar) and back. The conversion factor is shown below every result.
How to Convert PSI to Bar
What Is a PSI?
Exactly 6,894.757293168 pascals defines PSI (pounds per square inch), the US customary pressure unit.
What Is a Bar?
A bar equals exactly 100,000 pascals, a metric pressure unit common in weather and hydraulics.
Common PSI to Bar Reference Points
Real-world reference values for quick sanity checks.
| Item | PSI (psi) | Bar (approx.) |
|---|---|---|
| Typical car tire pressure | 32 psi | 2.21 bar |
| Standard atmosphere (approx.) | 14.7 psi | 1.01 bar |
| Reference values are illustrative approximations for common items, not measured specifications. | ||
PSI to Bar Conversion Table
| PSI (psi) | Bar (bar) |
|---|---|
| 10 psi | 0.689476 bar |
| 20 psi | 1.378951 bar |
| 30 psi | 2.068427 bar |
| 32 psi | 2.206322 bar |
| 50 psi | 3.447379 bar |
| 80 psi | 5.515806 bar |
| 100 psi | 6.894757 bar |
| 150 psi | 10.342136 bar |
| Source: NIST SP 811, Appendix B (1 psi = 6,894.757293168 Pa exactly) | |
Frequently Asked Questions
How do I convert PSI to bar?
Multiply the PSI value by 0.0689475729. For example, 32 psi × 0.0689475729 = 2.206 bar.
Is PSI to bar an exact conversion?
Yes. PSI is defined as exactly 6,894.757293168 pascals and bar as exactly 100,000 pascals, so the ratio between them is an exact, non-repeating value shown to the precision above.
Why do European and US tire gauges show different units?
The US uses PSI as its standard pressure unit for consumer purposes, while most of Europe uses the metric bar. Both measure the same physical quantity, just scaled differently, similar to Fahrenheit and Celsius for temperature.
Related Pressure Converters
A good measuring tool marked in both psi and bar removes the guesswork at the point of use.