27.71 inches of water column equals 1 psi
27.7 "h2o
1 psig is equivalent to 51.71 mm (2 in) of mercury or to approx 700 mm (27.5 in) of water. Technically one cannot have apsig. Psig represents a pressure reading of the pressure above normal atmospheric pressure of 14.7 psi. You mean a psi.
Inches of water x 0.03613 = psi
Inches of water x 0.03613 equals pounds per square inch (psi).
35 inches of water = 1.26 psi
20 psi = 555.85 inH2O @39.2 F
0.25 psig = 413.7 inches of water column
0.7 m
Multiply inches of WC by 0.0361 to obtain PSI.
10" Water Column equals about .4 Pounds per Square Inch or 0.36127291827412783psi exactly.
Pressure doesn't change when you change substance, 120 PSI in water equals 120 PSI in air.