That could depend on several different factors, such as altitude etc...
I do believe that at about sea level its -14.7 psi.
27.7 "h2o
Inches of mercury x 0.4912 = psi
Inches of water x 0.03613 equals pounds per square inch (psi).
10" Water Column equals about .4 Pounds per Square Inch or 0.36127291827412783psi exactly.
About 2 1 pound per square inch = 2.0362... inches of mercury
27.7 inches
27.71 inches of water column equals 1 psi
14.37 psi is 0.20317789 inches of mercury.
33.36 psi
27.7 "h2o
Inches of mercury x 0.4912 equals psi
90 million Pascal is about 13,053 psi
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 mercury x 0.4912 = psi
20 psi = 555.85 inH2O @39.2 F
psi = pounds per square inch, a measure of pressure a vacuum is an absence of pressure.
Inches of water x 0.03613 equals pounds per square inch (psi).