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Barometric Pressure - Pressure in Pounds per Square Inch and Square Foot

Relation between barometric pressure (inches Hg) and pressure in 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
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
  • 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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