How Do You Calculate PSI?

The psi, which stands for “pounds per square inch,” is a pressure unit that uses the foot-pound-second (FPS) system. To figure out psi, divide the force (F) by the area (A) (A).

How much force is being used?

Use a tool like a force gauge, a spring scale, or a strain gauge. Check to make sure the unit is in pounds. If necessary, change the value.

Find out how much force is being put on the whole area.

After measuring the length and width and making sure they are both in inches, you can multiply the two numbers.

Figure out the pressure in psi.

Divide the force measured in pounds by the area measured (in square inches).


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