What does psi measure? The acronym psi stands for pressure per square inch. 15.4 psi is equal to 1 Bar. By pathakrahul|2019-05-07T23:02:03+05:30May 7th, 2019|Comments Off on What does psi measure? Share This Story, Choose Your Platform! FacebookTwitterLinkedInRedditWhatsappGoogle+TumblrPinterestVkEmail About the Author: pathakrahul