The definition of pressure and the unit conversion between them

October 05, 2019

The definition of stress:

Pressure refers to the force acting on a unit area in a uniform and perpendicular manner

The unit of pressure is Pascal, or Pa (Pa)

In order to make everyone understand the relationship between the pressure unit (Pa or MPa) and the past units in the International System of Units, the table below shows the relationship between several units.

Various pressure unit conversion tables

Pressure unit Pa/Pa MPa/MPa Engineering atmospheric pressure/(kgf/cm2) Physical pressure/atm Hg/mmHg Water column/mH2O/(1b/in2) bar/bar Pa 1 1×106 1.0197× 10-5 9.869×10-6 7.501×10-3 1.0197×10-4 1.450×10-4 1×10-5 MPa 1×106 1 10.197 9.869 7.501×103 1.0197×102 1.450×102 10 Engineering atmospheric pressure 9.807× 104 9.807×10-2 1 0.9678 735.6 10.00 14.22 0.9807 Physical Atmosphere 1.0133×105 0.10133 1.0332 1 760 10.33 14.70 1.0133 Mercury 1.3332×102 1.3332×10-4 1.3595×10-3 1.3158×10-3 1 0.0136 1.934×10- 2 1.3332×10-3 water column 9.806×103 9.806×10-3 0.1000 0.09678 73.55 1 1.422 0.09806 (lbs/in 2) 6.895×103 6.895×10-3 0.07031 0.06805 51.71 0.7031 1 0.06895 Bar 1×105 0.1 1.0197 0.9869 750.1 10.197 14.50 1

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