Pressure Conversion Factors

Pressure:

1 psi = 6895 n/m³ = 6895 Pa = .069 bar = .069Kg/cm²
1 in Hg = 25.4 mm Hg = .4912 psi = 3386 N/m³
1 in H²O = 25.4 mm H²O = .0361 psi = 249.1 N/m²
1 atmosphere = 14.7 psi = 29.92 in Hg = 760 mm Hg = 101.325 kN/m²
1 bar = 14.504 psi = 100kN/m² = 1.02 Kg/cm²
1 foot head (water) = .433 psi

Liquid Pressure Equivalents

Liquid Pressure	Lb/in³ (psi)	Ft Water	Kg/Cm²	Atmosphere	Bar	Inch Mercury	kPa (kilopascal)
Lb/in³(psi)	*	2.31	0.070	0.068	0.069	2.04	6.895
Ft Water	0.433	*	0.030	0.029	0.030	0.882	2.99
Kg/Cm²	14.2	32.8	*	0.968	0.981	29.0	98
Atmosphere	14.7	33.9	1.03	*	1.01	29.9	101
Bar	14.5	33.5	1.02	0.987	*	29.5	100
Inch Mercury	0.491	1.13	0.035	0.033	0.034	*	3.4
kPa (kilopascal)	0.145	0.335	0.01	0.009	0.01	0.296	*

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Title: Pressure Conversion Factors
Description: Conversions for PSI, FT Water, Kg/Cm2, Atmosphere, Bar, Inch Mercury, and kPa.
Published: 10/5/2009
Last Edited: 1/19/2023

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