Bar vs kPa

Stamp Out Stupidity

Pounds per square inch (PSI), Bar and kPa are all units of pressure.

The Bar has been established for decades in many areas where death or injury will result from a lack of familiarity with the unit of pressure. E.g. Diving, storm forecasts, car tire pressure, inflatable boat pressure and pressurised air and water systems.

The Bar is dimensionless e.g. 2 Bar is simply a number 2.

This is the definition of the SI unit of kPa, – equivalent numerically to the Bar:

The SI unit of pressure.

We should ban the use of kPa in all mass markets where the Bar has already established itself as the, simple, preferred, logical, and totally familiar, unit for pressure.