PSI vs BAR – Do You Know the Difference? Pressure measurement is a fundamental concept in engineering, maintenance, hydraulics, pneumatics, and process industries. Two of the most common pressure units are PSI (Pounds per Square Inch) and BAR. Quick Conversion: 1 BAR = 14.5 PSI 1 PSI = 0.06895 BAR Whether you’re calibrating instruments, checking compressor pressure, setting pneumatic systems, or reading pressure gauges, understanding these units helps avoid errors and ensures accurate operation. Quick Tip: To convert PSI to BAR, divide by 14.5 To convert BAR to PSI, multiply by 14.5 Save this infographic for future reference and share it with fellow engineers and technicians!