PSI to Bar Converter

How to convert PSI to Bar

To convert PSI to Bar, multiply the value in PSI by 0.0689476. For example, 5 psi = 0.344738 bar.

The PSI-to-Bar conversion comes up often in everyday and professional contexts alike. With 1 psi equal to 0.0689476 bar, you can use the tool above for any value, or scan the table below for the most common PSI amounts and their Bar equivalents.

Pressure conversions are used in weather forecasting, engineering, diving, automotive maintenance, and industrial processes. Different fields favor different units, making conversion a regular necessity.

Understanding PSI and Bar

The pascal is the SI unit, but it's small, so kilopascals and bars are more practical for everyday use. PSI (pounds per square inch) dominates in US engineering and tire pressures, while atmospheres provide an intuitive reference point — 1 atm is roughly the air pressure at sea level. Weather reports use hectopascals or millibars, which are numerically identical.

How accurate is this conversion?

Pressure conversions are based on fixed physical definitions. One standard atmosphere equals exactly 101,325 pascals, and 1 bar equals exactly 100,000 pascals, so all conversions here are precise.

All conversion factors on ClearUnits are based on internationally recognised standards (the International System of Units, SI, and official definitions). Factors are reviewed for accuracy and the calculator uses full-precision values, rounding only the displayed result.

Quick reference: common PSI to Bar values

The most frequently searched conversions are 1 PSI = 0.0689476 Bar, 5 PSI = 0.344738 Bar, 10 PSI = 0.689476 Bar, and 100 PSI = 6.89476 Bar. The full table further down covers every common value, and the calculator handles any number you need in between.