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Barometric Pressure - Pressure in psi, psf and kPa

Convert between barometric pressure inches Hg, psi and psf.

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Relation between barometric pressure in inches Hg - Mercury - and pressure in pounds per square inch and pound per square foot are indicated below:

Barometer
(inches Hg)
Pressure
(psi)

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Pressure
(psf)
28.00 13.75 1980
28.25 13.87 1997
28.50 13.99 2015
28.75 14.12 2033
29.00 14.24 2050
29.25 14.36 2069
29.50 14.48 2086
29.75 14.61 2103
29.92* 14.7 2116
30.00 14.75 2121
30.25 14.85 2139
30.50 14.98 2156
30.75 15.10 2174
31.00 15.22 2192
31.25 15.34 2210

* NTP - Standard Atmosphere

  • 1 psi (lb/in2) = 144 psf (lbf/ft2) = 6894.8 Pa (N/m2) = 6.895x10-2 bar = 27.71 in H2O at 62oF (16.7oC) = 703.1 mm H2O at 62oF (16.7oC)

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Topics

Unit Converters

Temperature

oC
oF


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Length

m
km
in
ft
yards
miles
naut miles


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Area

m2
km2
in2
ft2
miles2
acres


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Volume

m3
liters
in3
ft3
us gal


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Weight

kgf
N
lbf


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Velocity

m/s
km/h
ft/min
ft/s
mph
knots


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Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O


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Flow

m3/s
m3/h
US gpm
cfm


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