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


millimeter water
pound/square inch

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.

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



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

More information from the unit converter

How many millimeter water in 1 pound/square inch? The answer is 703.06957829636. We assume you are converting between millimeter water [4 °C] and pound/square inch. You can view more details on each measurement unit: millimeter water or pound/square inch The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.10197162129779 millimeter water, or 0.00014503773800722 pound/square inch. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between millimeters water and pounds/square inch. Type in your own numbers in the form to convert the units!



Quick conversion chart of millimeter water to pound/square inch

1 millimeter water to pound/square inch = 0.00142 pound/square inch

10 millimeter water to pound/square inch = 0.01422 pound/square inch

50 millimeter water to pound/square inch = 0.07112 pound/square inch

100 millimeter water to pound/square inch = 0.14223 pound/square inch

200 millimeter water to pound/square inch = 0.28447 pound/square inch

500 millimeter water to pound/square inch = 0.71117 pound/square inch

1000 millimeter water to pound/square inch = 1.42233 pound/square inch


Want other units?

You can do the reverse unit conversion from pound/square inch to millimeter 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!