How to use this hangover and BAC calculator

Choose Quick, Standard or Advanced, then enter each drink’s size, ABV and time. Review standard-drink totals, the estimated BAC curve and the assumptions behind your result. The hangover score is an unvalidated heuristic, not a probability or diagnosis. Never use this estimate to decide when to drive.

Free to use, with no account required. Calculator inputs are saved in your browser when storage is available; shared links contain only a result summary.