Convert pound/square inch to foot water [4 °C]


psi
ft H2O

The above form works if you are measuring differential pressure, such as the difference in psi between two points. It also gives the correct answer for absolute pressure, assuming you are measuring psia, which is the pressure relative to absolute zero vacuum.

If you are measuring relative to vacuum and want to resolve the pressure relative to the atmosphere, then you should use the form below.

psi (relative to atmosphere)
ft H2O (relative to vacuum)



More information from the unit converter

How many psi in 1 ft H2O? The answer is 0.43352750192825. We assume you are converting between pound/square inch and foot water [4 °C]. You can view more details on each measurement unit: psi or ft H2O The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00014503773800722 psi, or 0.00033455256555148 ft H2O. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between pounds/square inch and feet water. Type in your own numbers in the form to convert the units!



Quick conversion chart of psi to ft H2O

1 psi to ft H2O = 2.30666 ft H2O

5 psi to ft H2O = 11.53329 ft H2O

10 psi to ft H2O = 23.06659 ft H2O

15 psi to ft H2O = 34.59988 ft H2O

20 psi to ft H2O = 46.13317 ft H2O

25 psi to ft H2O = 57.66647 ft H2O

30 psi to ft H2O = 69.19976 ft H2O

40 psi to ft H2O = 92.26635 ft H2O

50 psi to ft H2O = 115.33294 ft H2O


Want other units?

You can do the reverse unit conversion from ft H2O to psi, or enter any two units below:

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Common pressure conversions


Definition: Pound/square inch

The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/in² or lbf/in²) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch.


Metric conversions and more

ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 70 kg, 150 lbs, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!