Convert Pound Per Square Foot to Pound Per Square Inch (psf to psi)

In next fields, kindly type your value in the text box under title [ From: ] to convert from pound per square foot to pound per square inch (psf to psi). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].


Pound Per Square Foot (abbreviations: psf, or lb/ft2): is a British (Imperial) and American pressure unit which is directly related to the psi pressure unit by a factor of 144 (1 sq ft = 12 in x 12 in = 144 sq in). Where, 1 pound per square foot equals 47.8803 pascals.

Pound Per Square Inch (abbreviations: psi, or lb/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.

How to Convert Pounds Per Square Feet to Pounds Per Square Inches

Example: How many pounds per square inches are equivalent to 87.9 pounds per square feet?


1 pounds per square feet = 0.00694444 pounds per square inches

87.9 pounds per square feet = Y pounds per square inches

Assuming Y is the answer, and by criss-cross principle;

Y equals 87.9 times 0.00694444 over 1

(i.e.) Y = 87.9 * 0.00694444 / 1 = 0.610416276 pounds per square inches

Answer is: 0.610416276 pounds per square inches are equivalent to 87.9 pounds per square feet.

Practice Question: Convert the following units into psi:

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 47.99 psf

( ii ) 12.98 psf

( iii ) 90.79 psf

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