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Bar

The bar is a widely used metric unit of measurement for pressure. 1 bar equals precisely 100,000 pascals. Even though bar is not an SI unit, it has been adopted as one of the most popular pressure units particularly in European countries where most pressure measurement instruments are specified with pressure ranges in bar.

The value of 1 bar is a close approximation to atmospheric pressure and is often used to represent atmospheric pressure rather than standard atmosphere (101325 pascals) which is the correct value used by the scientific and engineering community.

Sometimes, “Bar(a)” and “bara” are used to indicate absolute pressures and “bar(g)” and “barg” for gauge pressures.

bar unit pressure measuring instruments

Conversion Factors:

Each bar equals to:

• 0.986923 atm

• 1.01972 at

• 1019.72 cmH2O

• 750.062 cmHg

• 1,000,000 Dyne/cm²

• 33.456 ftH2O

• 1000 hPa

• 401.865 InH2O

• 29.53 InHg

• 100 KPa

• 0.1 MPa

• 10.1972 mH2O

• 1000 mbar

• 10,197.2 mmH2O

• 750.062 mmHg

• 750062 mTorr

• 232.06 Oz/in²

• 100,000 Pa

• 14.5038 psi

• 1.0443 tons/ft²

• 0.00647 tons/in²