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Pound-force per square inch


The pound per square inch or, more accurately, pound-force per square inch (symbol: lbf/in2; abbreviation: psi) 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:

Therefore, one pound per square inch is approximately 6894.757 Pa.

Now converting the psi to standard atmospheres:


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