Convert Torr to Bar

Formula

bar = Torr × 0.001333223684211

or bar = Torr ÷ 750.0616827042

Derivation from SI units:

• 1 Torr = 101325/760 Pa = 133.3223684 Pa (1/760 of a standard atmosphere)
• 1 bar = 10⁵ Pa (exact, by definition)
• 1 Torr = 133.3223684211 Pa ÷ 100000 Pa per bar = 0.001333223684211 bar

Both units are defined exactly, so the factor is exact. Torr definition: torr; Bar definition: bar.

Worked examples

1. A reading of 0.1 Torr converts to 0.0001333223684 bar.
   0.1 Torr × 0.001333223684 = 0.0001333223684 bar
2. A value of 100 Torr is 0.1333223684 bar.
   100 Torr × 0.001333223684 = 0.1333223684 bar

Where it's used

Torr are used for vacuum technology and vacuum gauges, while bar appear in compressed air and pneumatics (6–8 bar). Both measure pressure, stress and differential pressure (force per unit area), so the conversion is a fixed factor.

Torr to other pressure units

Frequently asked questions

Sources

• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "torr (Torr)".
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "bar".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.