What is the difference between psi and bar?

Answer 1

For your information, Bar is the atmospheric pressure at the sea level, which equals to 100 kilopascals. Psi is 1 pound of force per square inch. You may use this pressure conversion table if you are converting from bar to psi (pound per square inch) for the values listed in the table below.

1 Bar = 14.5037738 Psi (Pound Per Square Inch)

Answer 2

Psi (pounds per square inch) and bar (force per unit area) are both units of pressure. However, psi is commonly used in the United States, while bar is more commonly used in countries that use the metric system. 1 bar is equal to approximately 14.5 psi.