bar is a unit of measurement for pressure, for example for air pressure in pneumatic tools.

Why is this important?

• The correct pressure is essential for the performance, service life and safe operation of pneumatic tools

As a rule of thumb, 1 bar is roughly equivalent to the atmospheric pressure at the Earth’s surface or the hydrostatic pressure of a column of water with a height of 10 metres. In other countries, the units PSI or kg/cm² are commonly used.

[Wikipedia / Further explanation: https://de.wikipedia.org/wiki/Bar_(Einheit)]

PSI = pound-(force) per square inch = a unit of pressure commonly used in the USA

[https://de.wikipedia.org/wiki/Pound-force_per_square_inch]

1 psi ≈ 0.069 bar

1 bar = 14.504 psi

By the way:

• Why not have a look at our pressure loss calculator

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