Convert pound/square inch to newton/square millimetre


pound/square inch
newton/square millimeter

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)
newton/square millimeter (relative to vacuum)



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

More information from the unit converter

How many pound/square inch in 1 newton/square millimeter? The answer is 145.03773800722. We assume you are converting between pound/square inch and newton/square millimetre. You can view more details on each measurement unit: pound/square inch or newton/square millimeter The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00014503773800722 pound/square inch, or 1.0E-6 newton/square millimeter. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between pounds/square inch and newtons/square millimeter. Type in your own numbers in the form to convert the units!



Quick conversion chart of pound/square inch to newton/square millimeter

1 pound/square inch to newton/square millimeter = 0.00689 newton/square millimeter

10 pound/square inch to newton/square millimeter = 0.06895 newton/square millimeter

50 pound/square inch to newton/square millimeter = 0.34474 newton/square millimeter

100 pound/square inch to newton/square millimeter = 0.68948 newton/square millimeter

200 pound/square inch to newton/square millimeter = 1.37895 newton/square millimeter

500 pound/square inch to newton/square millimeter = 3.44738 newton/square millimeter

1000 pound/square inch to newton/square millimeter = 6.89476 newton/square millimeter


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You can do the reverse unit conversion from newton/square millimeter 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!