Science, Tech, Math › Science Converting Pounds Per Square Inch or PSI to Pascals Share Flipboard Email Print Pascals (Pa) and pounds per square inch (PSI) are both units of pressure. John Lund/Getty Images Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated May 07, 2019 This example problem demonstrates how to convert the pressure unit pounds per square inch (psi) to pascals (Pa). PSI To Pa Problem The average air pressure at sea level is 14.6 psi. What is this pressure in Pa?Solution:1 psi = 6894.7 PaSet up the conversion so the desired unit will be canceled out. In this case, we want Pa to be the remaining unit.pressure in Pa = (pressure in psi) x (6894.7 Pa/1 psi)pressure in Pa = (14.6 x 6894.7) Papressure in Pa = 100662.7 PaAnswer:The average sea level air pressure is 100662.7 Pa or 1.0 x 105 Pa.