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


pound/square inch
ft water

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.

pound/square inch (relative to atmosphere)
ft water (relative to vacuum)



Did you mean to convert pound/square inch
pound/square inch [gauge]
pound/square inch [absolute]
 to ft water

More information from the unit converter

How many pound/square inch in 1 ft water? 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: pound/square inch or ft water The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00014503773800722 pound/square inch, or 0.00033455256555148 ft water. 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 pound/square inch to ft water

1 pound/square inch to ft water = 2.30666 ft water

5 pound/square inch to ft water = 11.53329 ft water

10 pound/square inch to ft water = 23.06659 ft water

15 pound/square inch to ft water = 34.59988 ft water

20 pound/square inch to ft water = 46.13317 ft water

25 pound/square inch to ft water = 57.66647 ft water

30 pound/square inch to ft water = 69.19976 ft water

40 pound/square inch to ft water = 92.26635 ft water

50 pound/square inch to ft water = 115.33294 ft water


Want other units?

You can do the reverse unit conversion from ft water to pound/square inch, 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!