PSI to Bar converter

How to convert pounds per square inch to bar

To convert pounds per square inch to bar, use bar = psi × 0.0689476. For example, 40 psi is 2.7579 bar. Type any value in the converter above and the result updates instantly.

The PSI to Bar formula

The conversion is bar = psi × 0.0689476. One pound per square inch equals 0.0689476 bar. This conversion is exact: pound per square inch is defined precisely in terms of bar, so the only rounding is in the digits shown.

PSI to Bar conversion table

Where pounds per square inch and bar are used

PSI (pounds per square inch) is the common unit for tire, air compressor and hydraulic pressure in the United States.

Bar is the common unit for tire, water and gas pressure in Europe; 1 bar is roughly atmospheric pressure.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• 14.5 psi = 0.99974 bar
• 30 psi = 2.06843 bar
• 35 psi = 2.41317 bar

Converting pounds per square inch to bar in your head

As a quick estimate, multiply by 0.069 (rounded).

Bar to PSI reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• Gauge pressure (what tire gauges read) does not include atmospheric pressure; the conversion between units is unaffected.
• Tire pressure in psi and bar should always follow the vehicle maker's recommended value.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the Bar to PSI converter.