The psi, or pounds per square inch, is a unit of pressure (P) using the foot-pound-second (FPS) system. To calculate psi, divide the force applied (F) with the area (A).Continue Reading
Use an instrument such as a force gauge, spring scale or strain gauge. Make sure that the unit is in pounds. Convert the value if necessary.
Measure the length and the width, and make sure that both values use the same unit, in this case inches, you can proceed to multiply them.
Divide the measured force (in pounds) with the measure area (in square inches).
Converting a metric unit, such as kilograms, to a U.S. Standard unit, such as pounds, is a matter of finding the correct conversion rate and multiplying. The conversion rate tells you how many of one unit equals another unit.Full Answer >
"PSI" is an acronym that stands for "pounds per square inch," and it is the standard unit of measurement for pressure. When measuring tire pressure, the PSI is equal to the pounds of air pressure being exerted on a 1-square-inch area within the tire.Full Answer >
Common units for pressure include the Pascal, atmosphere, bar, Torr, millimeters of mercury and pounds per square inch. These are abbreviated as Pa, atm, bar, Torr, mmHg, and psi, respectively.Full Answer >
Residential water pressure should not exceed 80 pounds per square inch, or psi, and outdoor irrigation systems typically have a water pressure of 30 to 50 psi. Sometimes water is supplied to houses at 100 or even 150 psi.Full Answer >