Convert pound/square foot to pound/square inch


lb/ft^2
psi

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.

lb/ft^2 (relative to vacuum)
psi (relative to atmosphere)



More information from the unit converter

How many lb/ft^2 in 1 psi? The answer is 144. We assume you are converting between pound/square foot and pound/square inch. You can view more details on each measurement unit: lb/ft^2 or psi The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.020885434273039 lb/ft^2, or 0.00014503773800722 psi. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between pounds/square foot and pounds/square inch. Type in your own numbers in the form to convert the units!



Quick conversion chart of lb/ft^2 to psi

1 lb/ft^2 to psi = 0.00694 psi

10 lb/ft^2 to psi = 0.06944 psi

50 lb/ft^2 to psi = 0.34722 psi

100 lb/ft^2 to psi = 0.69444 psi

200 lb/ft^2 to psi = 1.38889 psi

500 lb/ft^2 to psi = 3.47222 psi

1000 lb/ft^2 to psi = 6.94444 psi


Want other units?

You can do the reverse unit conversion from psi to lb/ft^2, 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!