The international Conference on Precision Physics and Fundamental Physical Constants (FFK 2023) will take place in Vienna from 22nd to 26th of May 2023. It is organised by the Stefan Meyer Institute for subatomic physics of the Austrian Academy of Sciences. It follows the rich traditions of the previous seminars and conferences which started in St. Petersburg, Russia in 2008. The conference will follow the recent progress in the field and the introduction of the new version of the SI system based on fundamental constants which came in action in May, 2019.