-psi – in H20 – in Hg – bar – mm
Hg (lorr)		 – cm H20 – kgm/cm = kPa
(kN/m)		 – atm
atmosphere 14.70 406.8 29.92 1.013 760 1033 1.033 9.87 x 10
kPa (kN/m) 0.145 4.01 0.295 0.0100 7.5 10.20 10.2 x 10 9.87 x 10
kgm/cm 14.22 393.7 28.95 0.981 735.3 1000 0.968 0.968
cm H20 1.42 x 10 0.394 2.89 x 10 9.81 x 10 0.736 1.0 x 10 9.7 x 10 9.7 x 10
mm Hg(lorr) 1.934 x 10 0.535 3.937 x 10 1.33 x 10 1.36 1.36 x 10 1.36 x 10 1.316 x 10
bar 14.5 401.4 29.53 750 1020 100 .987 987
n Hg 0.491 13.6 3.39 x 10 25.4 34.5 3.39 3.34 x 10 3.34 x 10
in H20 3.61 x 10 7.36 x 10 2.49 x 10 1.87 2.54 0.249 2.46 x 10 2.46 x 10
psi 27.68 2.04 6.89 x 10 51.7 70.3 6.90 6.80 x 10 6.80 x 10