How to convert psi to bar

Step-by-step explanation of how to convert psi to bar, with formulas, worked examples, and a free online calculator.

To convert PSI (pounds per square inch) to bar, multiply by 0.0689476. The formula is: bar = PSI × 0.0689476. For example, 30 PSI × 0.0689476 = 2.07 bar. This conversion comes up frequently with tire pressure (car tires are typically 30-35 PSI / 2.0-2.4 bar) and industrial pressure gauges. Quick memory aid: 1 bar ≈ 14.5 PSI, and 1 PSI ≈ 0.069 bar. To convert the other way, divide bar by 0.0689476 (or multiply by 14.5038).