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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:

Barometric Pressure in psi vs. psf vs. kPa
Barometer
(inches Hg)
Pressure
(psi)
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)

barometric pressure - inHg vs psi vs kPa chart

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