Unit converter
Pounds Per Square Inch to Bar Converter
Change a pressure given in pounds per square inch into bar. One psi is defined through the pascal as 6894.757293168361 Pa, and since a bar is exactly 100000 Pa, a single psi amounts to about 0.0689475729 bar. Put in any psi value and the tool reports the bar equivalent, with a lookup table for the readings requested most often. People reach for this swap when an American tyre gauge shows psi but the door placard lists bar, and it serves the same purpose for bicycle tyres, scuba tank fills, hydraulic pressure settings, and barometric figures shared in mixed units.
1 pound per square inch = 0.068948 bar
Common pounds per square inch to bar values
| Pounds per square inch | Bar |
|---|---|
| 1 psi | 0.068948 bar |
| 2 psi | 0.137895 bar |
| 5 psi | 0.344738 bar |
| 10 psi | 0.689476 bar |
| 20 psi | 1.379 bar |
| 50 psi | 3.4474 bar |
| 100 psi | 6.8948 bar |
How to convert
- Begin with the pressure expressed in psi.
- Multiply it by 0.0689475729, the number of bar in one psi.
- The result is that same pressure shown in bar.
- To reverse the step, divide a bar reading by 0.0689475729, or multiply it by 14.503773773 to recover psi.
- As a rough check, divide the psi value by about 14.5: 30 psi lands near 2.07 bar.
bar = psi × 0.0689475729
Since a psi is 6894.757293168361 pascals and a bar is 100000 pascals, dividing the former by the latter gives the factor 0.0689475729. Multiplying a psi reading by that factor produces bar, and dividing bar by it returns psi. Both units trace back to the pascal, so a single fixed multiplication does the job.
- psi
- the pressure in psi you begin with
- 0.0689475729
- bar in one psi (6894.757293168361 Pa divided by 100000 Pa)
Worked example
A rear tyre set to 35 psi at a US service station works out at 35 times 0.0689475729, about 2.41 bar. A road bike tyre held at 100 psi converts to roughly 6.89 bar, useful when a European pump is marked only in bar.
Key facts
- One psi is about 0.0689475729 bar; one bar is roughly 14.5 psi.
- A 32 psi car tyre reads close to 2.21 bar.
- A 120 psi air compressor tank sits near 8.27 bar.
- Atmospheric pressure of 14.7 psi at sea level is about 1.01 bar.
Tips
- If your gauge shows psi but the manual asks for bar, multiply by about 0.069 to set the right target.
- For bicycle tyres labelled in psi on the sidewall, the bar figure helps when the only pump to hand is metric.
- Hold the precision through the calculation and round just the bar answer so the result does not drift.
Frequently asked questions
How many bar in 1 psi?+
One psi is about 0.0689475729 bar, since a psi is 6894.757293168361 pascals and a bar is 100000 pascals.
How many psi in 1 bar?+
Roughly 14.503773773 psi, the reciprocal of the figure above. So 1 bar is a touch over 14.5 psi.
What is 32 psi in bar?+
About 2.21 bar, a common cold tyre pressure for many saloon cars.
Why do pumps differ between countries?+
The United States quotes psi while much of Europe uses bar, so tyre gauges and compressors are marked to suit the local convention.
Things to watch
- A gauge usually reads pressure above the surrounding air rather than absolute pressure, so do not add atmospheric pressure twice when comparing readings.
Sources
Last updated: 2026-01-01
Conversions use internationally defined factors. Provided for general use; verify critical measurements independently.