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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:

(inches Hg)
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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