Pressure


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Pressure is a measurement of the force a gas exerts on a given area. It is most commonly measured in pounds per square inch (psi), bar, kgf/cm2 or atmospheres. The latter three units are quite similar and can often be used together without conversion.


Pascal (Pa)
Bar (bar)
Technical atmosphere (at)
Atmosphere (atm)
Torr (mmHg)
Pound per square inch (psi)
1 Pa
1 N/m²
10−5
10.197×10−6
9.8692×10−6
7.5006×10−3
145.04×10−6
1 bar
100,000
106 dyn/cm²
1.0197
0.98692
750.06
14.504
1 at
98,066.5
0.980665
1 kgf/cm²
0.96784
735.56
14.223
1 atm
101,325
1.01325
1.0332
101,325 Pa
760
14.696
1 torr
133.322
1.3332×10−3
1.3595×10−3
1.3158×10−3
1 mmHg
19.337×10−3
1 psi
6,894.76
68.948×10−3
70.307×10−3
68.046×10−3
51.715
1 lbf/in²

Wikipedia: Pressure