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?
As;
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
