PSI stands for Pounds per Square Inch, a unit of pressure. Learn how to convert PSI to other units, such as pascals, atmospheres, and torr. Full form of PSI : Here, we are going to learn about the PSI, full form of PSI , overview, history, PSI of India, etc. Guide to Full Form of PSI . Here we discuss the Definition and How to Calculate Pounds Per Square Inch along with Difference. PSI is a unit of pressure used mainly in the United States and other countries using the imperial measurement system. PSI measures the amount of force (in pounds) exerted per square inch of surface area.
