PSI to Bar Converter
Convert PSI to bar instantly. Enter pounds per square inch to get pressure in bar, with the exact conversion factor and the reverse bar to PSI direction shown.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the PSI to Bar Converter Works
This tool converts pounds per square inch (PSI) to bar and back. Both are units of pressure, the force applied over an area. PSI is widely used in the US and UK for tyres, compressors and hydraulics, while bar is the everyday metric unit in Europe.
The Formula
Bar = PSI × 0.0689476 PSI = bar × 14.5038
The factor comes from the definitions: 1 bar = 100,000 pascals and 1 PSI = 6,894.76 pascals. Dividing gives 1 PSI = 0.0689476 bar.
Worked Example
Convert a tyre pressure of 32 PSI to bar:
- bar = 32 × 0.0689476 = 2.21 bar
Going the other way, 2.5 bar in PSI:
- PSI = 2.5 × 14.5038 = 36.3 PSI
PSI to Bar Quick Reference
| PSI | Bar |
|---|---|
| 20 | 1.38 |
| 30 | 2.07 |
| 32 | 2.21 |
| 35 | 2.41 |
| 40 | 2.76 |
Where You Use This Conversion
The most common reason to convert PSI to bar is tyre pressure, especially when a manual or pressure chart uses one unit and your gauge shows the other. The same conversion applies to bicycle tyres, air compressors, espresso machines (often rated at 9 bar) and hydraulic systems.
Frequently asked questions
How many bar is 1 PSI?+
One PSI equals about 0.0689476 bar. So tyre pressure of 32 PSI is roughly 2.2 bar. To convert any PSI value to bar, multiply by 0.0689476.
How do I convert PSI to bar?+
Multiply the PSI value by 0.0689476. For example, 32 PSI × 0.0689476 = 2.21 bar. To reverse it, divide bar by 0.0689476 or multiply bar by 14.5038.
What is 32 PSI in bar?+
32 PSI is about 2.21 bar. This is a typical car tyre pressure, which is why tyre charts often list both units side by side.
Is bar the same as atmospheric pressure?+
Almost. One bar equals 100,000 pascals, which is very close to standard atmospheric pressure at sea level (1 atm = 1.01325 bar). They are not identical but are often used interchangeably for rough estimates.
Why do tyres list pressure in both PSI and bar?+
PSI is the common unit in the US and UK, while bar is standard across mainland Europe. Listing both lets drivers set the correct pressure regardless of which gauge or manual they use.