The following information may have errors; It is not permissible to be read by anyone who has ever met a lawyer. Use is confined to Engineers with more than 370 course hours of electronic engineering for theoretical studies.

ph +1(785) 841 3089 Email inform@xtronics.com

Pressure Conversion Table

From Transwiki
Jump to: navigation, search

[edit] Pressure Conversions

The following information may have errors; most are accurate, but is not to be used by anyone who has ever met an attorney.

* Process Control Panel Meters from Transtronics - this sites sponsor. 

[edit] Conversion Factors

To convert Into Multiply by
atmosphere bar 1.01295
atmosphere dynes/cm2 1.01295 x 106
atmosphere in. Hg 29.9213
atmosphere in. water 406.86
atmosphere kg/cm2 1.03325
atmosphere mbar 1012.95
atmosphere mtorr or micron Hg 7.6 x 105
atmosphere Pa or N/m2 1.01295 x 105
atmosphere PSI or lb/in2 14.696
atmosphere torr or mm Hg 760
bar atmosphere 0.9872
bar dynes/cm2 1 x 106
bar in. Hg 29.54
bar in. water 401.65
bar kg/cm2 1.02
bar mbar 1000
bar mtorr or micron Hg 7.5028 x 105
bar Pa or N/m2 1 x 105
bar psi or lb/in2 14.503861
bar torr or mm Hg 750.2838
dynes/cm2 atmosphere 9.872 x 10-7
dynes/cm2 bar 1 x 10-6
dynes/cm2 in. Hg 2.954 x 10-5
dynes/cm2 in. water 4.0165 x 10-4
dynes/cm2 kg/cm2 1.0200 x 10-6
dynes/cm2 mbar 1 x 10-3
dynes/cm2 mtorr or micron Hg 0.75028
dynes/cm2 Pa or N/m2 0.1
dynes/cm2 psi or lb/in2 1.4508 x 10-5
dynes/cm2 torr or mm Hg 7.5028 x 10-4
in. Hg atmosphere 3.342 x 10-2
in. Hg bar 3.385 x 10-2
in. Hg dynes/cm2 3.385 x 104
in. Hg in. water 13.598
in. Hg kg/cm2 3.4532 x 10-2
in. Hg mbar 33.85
in. Hg mtorr or micron Hg 2.54 x 104
in. Hg Pa or N/m2 3385
in. Hg psi or lb/in2 0.4912
in. Hg torr or mm Hg 25.4
in. water atmosphere 2.458 x 10-3
in. water bar 2.489 x 10-3
in. water dynes/cm2 2.489 x 103
in. water kg/cm2 2.5396 x 10-3
in. water in. Hg 7.354 x 10-2
in. water mbar 2.489
in. water mtorr or micron Hg 1.868 x 10-3
in. water Pa or N/m2 248.9
in. water psi or lb/in2 3.612 x 10-2
in. water torr or mm Hg 1.868
kg/cm2 atmosphere 0.9678
kg/cm2 bar 0.9804
kg/cm2 dynes/cm2 9.804 x 105
kg/cm2 in. Hg 28.958
kg/cm2 in. water 393.76
kg/cm2 mbar 9.804 x 102
kg/cm2 mtorr or micron Hg 7.3554 x 105
kg/cm2 Pa or N/m2 9.804 x 104
kg/cm2 psi or lb/in2 14.223
kg/cm2 torr or mm Hg 7.3554 x 102
mbar atmosphere 9.872 x 10-4
mbar bar 0.001
mbar dynes/cm2 1000
mbar kg/cm2 1.0200 x 10-3
mbar in. Hg 2.954 x 10-2
mbar in. water 0.4018
mbar mtorr or micron Hg 7.5028 x 102
mbar Pa or N/m2 100
mbar psi or lb/in2 1.450 x 10-2
mbar torr or mm Hg 0.75028
mtorr or micron Hg atmosphere 1.316 x 10-6
mtorr or micron Hg bar 1.3328 x 10-6
mtorr or micron Hg dynes/cm2 1.3328
mtorr or micron Hg kg/cm2 1.3595 x 10-6
mtorr or micron Hg in. Hg 3.937 x 10-5
mtorr or micron Hg in. water 5.353 x 10-4
mtorr or micron Hg mbar 1.3328 x 10-3
mtorr or micron Hg Pa or N/m2 0.13328
mtorr or micron Hg psi or lb/in2 1.934 x 10-5
mtorr or micron Hg torr or mm Hg 1 x 10-3
Pa or N/m2 atmosphere 9.869 x 10-6
Pa or N/m2 bar 1 x 10-5
Pa or N/m2 dynes/cm2 10
Pa or N/m2 kg/cm2 1.020 x 10-5
Pa or N/m2 in. Hg 2.954 x 10-4
Pa or N/m2 in. water 4.018 x 10-3
Pa or N/m2 mbar 0.01
Pa or N/m2 mtorr or micron Hg 7.5028
Pa or N/m2 psi or lb/in2 1.4508 x 10-4
Pa or N/m2 torr or mm Hg 7.5028 x 10-3
psi or lb/in2 atmosphere 0.068046
psi or lb/in2 bar 0.068948
psi or lb/in2 dynes/cm2 6.8948 x 104
psi or lb/in2 kg/cm2 7.0309 x 10-2
psi or lb/in2 in. Hg 2.036
psi or lb/in2 in. water 27.68
psi or lb/in2 mbar 68.948
psi or lb/in2 mtorr or micron Hg 5.171 x 104
psi or lb/in2 Pa or N/m2 6.8927 x 103
psi or lb/in2 torr or mm Hg 51.71
torr or mm Hg atmosphere 1.3158 x 10-3
torr or mm Hg bar 1.3328 x 10-3
torr or mm Hg dynes/cm2 1.3328 x 103
torr or mm Hg kg/cm2 1.3595 x 10-3
torr or mm Hg in. Hg 3.937 x 10-2
torr or mm Hg in. water 0.5353
torr or mm Hg mbar 1.3328
torr or mm Hg mtorr or micron Hg 1000
torr or mm Hg Pa or N/m2 133.28
torr or mm Hg psi or lb/in2 1.934 x 10-2

[edit] Elevation to Air pressure

Pressue-vs-altitude.png

  • PSI vs Feet
  • < 36089 ft; Alt = 145422.156 * (1-(psi/14.697)^0.190263105)
  • > 36089 ft; Alt = 20805.8257# * log(3.282807/Psi) + 36089.2388
  • < 36089 ft; Psi = 14.697 * (1 - Alt/145422.156)^5.255879746
  • > 36089 ft; Psi = 3.282807 / exp((Alt - 36089.2388)/20805.8257)

Temperature does have an effect, but these formulas represent standard day conditions. On a standard day the temperature is known and the lapse rate (temp change with altitude) is fixed by the ideal gas law. By definition the standard atmosphere is dry air.

Personal tools