OK folks, to be clear:

1 Bar = 14.5 psi (can be gauge or absolute)
1 Atmosphere = 14.696 usually psia but can be psig but no one will know what you mean...
1 Bar = 100 kPa which is the common EU measure for pressure for tires 'n such
When you talk about mBar, or Torr (same as mm Hg), you're typically talking in terms of low pressure, and measurement on an absolute scale not gauge while "Hg is typically gauge pressure (ie. full vacuum is 29.92 "hg).

There are a ton of other SI units out there as well. But these are the basic units.

Keith Hughes
'86 Westy GenV Turbo (Marvin)

Date: Mon, 10 Feb 2020 18:53:12 -0800
From: Alistair Bell <albell@SHAW.CA>
Subject: Re: PSI and Bars, for tire pressure

Yup, and the pendant in me has to point out one bar is 14.7, not 14.1 psi.

:-)

Alistair