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


inch water
lbs/in^2

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.

inch water (relative to vacuum)
lbs/in^2 (relative to atmosphere)



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

More information from the unit converter

How many inch water in 1 lbs/in^2? The answer is 27.679904842545. We assume you are converting between inch water [4 °C] and pound/square inch. You can view more details on each measurement unit: inch water or lbs/in^2 The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.0040146307866177 inch water, or 0.00014503773800722 lbs/in^2. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches water and pounds/square inch. Type in your own numbers in the form to convert the units!



Quick conversion chart of inch water to lbs/in^2

1 inch water to lbs/in^2 = 0.03613 lbs/in^2

10 inch water to lbs/in^2 = 0.36127 lbs/in^2

20 inch water to lbs/in^2 = 0.72255 lbs/in^2

30 inch water to lbs/in^2 = 1.08382 lbs/in^2

40 inch water to lbs/in^2 = 1.44509 lbs/in^2

50 inch water to lbs/in^2 = 1.80636 lbs/in^2

100 inch water to lbs/in^2 = 3.61273 lbs/in^2

200 inch water to lbs/in^2 = 7.22546 lbs/in^2


Want other units?

You can do the reverse unit conversion from lbs/in^2 to inch water, 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!