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). Measure the force applied. 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.
Pounds per square inch (psi) is a unit of pressure most commonly associated with tire pressure for an automobile or bike tire. However, because pressure gauges are attached to most tire pumps, there's often very little need to calculate psi in this context. People working with hydraulics also use psi, often to ...
Pressure and force are related, and so you can calculate one if you know the other by using the physics equation, P = F/A. Because pressure is force divided by area, its meter-kilogram-second (MKS) units are newtons per square meter, or N/m2. In the foot-pound-second (FPS) system, the units are pounds per square inch, or psi.
Pounds or pound force per square inch (psi, lb/in², pfsi or lbf/in²) is a widely used British and American unit of measure for pressure. 1 psi equals 6,894.76 pascals. In the USA the PSI pressure unit is the pimary unit of measure for pressure and almost all pressure instruments are specified and display in pounds per square inch.
Use the rule that there are 0.433 psi per foot of water to calculate the psi of an elevated water storage tank, or alternatively, the rule that every 2.31 feet of water creates 1 psi. Use the formula: P = 0.433 × h, where h is the height of the water surface in feet and P is the pressure in psi.
One formula used to convert psi to bar is: 1 psi = (32.174 lbm /1 lbf s2)x(0.45359237 kg /1 lbm)x(144 in2/1 ft2)x(1 ft /0.3048 m) ... PSI is pounds per square inch. The conversion rate between the ...
"Psi" says the formula. The pound per square inch or, more accurately, pound-force per square inch - symbol: psi or lbf/in2 or lbf/in2 - is a unit of pressure or of stress based on avoirdupois units.
Horsepower (hp) = pressure (psi) x flow (gpm) / 1714 -or- BTU/hr = 1½ x psi x gpm 1 BTU/hr = .0167 BTU/min = .00039 hp Example: 10 gpm flow across a pressure reducing valve with a 300 psi drop = 1.75 hp of heat generated
However, the population stability index is an industry-accepted metric that presents some convenient rules of thumb for the same. The population stability index (PSI) formula is displayed below (refer to ‘Credit Risk Scorecards’ by Naeem Siddiqui)
The formula for pressure is. P = F/A. In this equation, P stands for pressure while F stands for force and A stands for area. Pressure is typically measured in a unit called the Pascal.