On behalf of the organizers, we would like to warmly invite you to attend the 6th International Conference on Population Balance Modelling (PBM2018) to be held in Ghent, Belgium during 7 – 9 May 2018. This conference aims at bring together researches and practitioners with diverse backgrounds to allow exchange of ideas across various sub-fields that use population balances, and to provide opportunities for researchers to identify new domains to expand into and new tools to use.