Convert PSI (psi) to Bars (bar)
Need to convert PSI to bar? 1 psi equals about 0.0689 bar. This converter turns pounds per square inch (psi) — the pressure unit on US tyre gauges and air compressors — into bar, the metric unit used across Europe for tyre pressure, diving and industrial equipment.
Formula
1 psi = 0.068948 bar
To convert psi to bar, divide the value by 14.503768.
Conversion Table
| PSI (psi) | Bars (bar) |
|---|---|
| 0.01 psi | 0.0007 bar |
| 0.1 psi | 0.0069 bar |
| 0.5 psi | 0.0345 bar |
| 1 psi | 0.0689 bar |
| 2 psi | 0.1379 bar |
| 3 psi | 0.2068 bar |
| 5 psi | 0.3447 bar |
| 10 psi | 0.6895 bar |
| 15 psi | 1.0342 bar |
| 20 psi | 1.379 bar |
| 25 psi | 1.7237 bar |
| 50 psi | 3.4474 bar |
| 100 psi | 6.8948 bar |
| 250 psi | 17.2369 bar |
| 500 psi | 34.4738 bar |
| 1000 psi | 68.9476 bar |
| 2500 psi | 172.369 bar |
| 5000 psi | 344.738 bar |
| 10000 psi | 689.476 bar |
| 50000 psi | 3447.38 bar |
Common psi to bar Examples
- 1 psi = 0.0689 bar
- 5 psi = 0.3447 bar
- 10 psi = 0.6895 bar
- 25 psi = 1.7237 bar
- 50 psi = 3.4474 bar
- 100 psi = 6.8948 bar
- 500 psi = 34.4738 bar
- 1000 psi = 68.9476 bar
About psi to bar
PSI and bar both measure pressure but come from different systems. 1 bar = 14.5038 psi, so to convert psi to bar you divide by 14.5038 (or multiply by 0.0689476). Bar is very close to one atmosphere (1 atm = 1.01325 bar).
The most common use is tyre pressure: US gauges read psi while European cars list bar — a typical car tyre sits around 2.2–2.5 bar, or 32–36 psi. It also turns up in scuba diving, HVAC and pneumatics. For a quick estimate, divide psi by 14.5 to get bar.
Frequently Asked Questions
Where does the unit bar come from?
Bars is a Pressure unit with its own historical and regional roots, now defined in relation to internationally agreed reference standards.
Where does the unit psi come from?
PSI is a standard Pressure unit used in specific regions or fields. Its definition has been refined over time to match international measurement standards.
Why are there different units for Pressure?
Different regions and industries developed their own Pressure standards over time. International trade and science later required conversion tools to bridge them.
What is the difference between psi and bar?
Both measure Pressure, but they belong to different unit systems or scales, which is why a conversion factor is needed between them.
Can I convert bar back to psi?
Yes. Simply invert the ratio: divide the bar value by 0.068948 to get the equivalent in psi.
How many decimal places should I keep when converting psi to bar?
For everyday use, 2 to 4 decimal places are enough. Scientific or engineering work may require 6 or more.