Alcohol extrapolation is a mathematical process, based on sound scientific principles, that is used routinely in pharmacology, toxicology, and clinical medicine. This process may be applied to situations involving ethyl alcohol consumption with reliability when reasonable assumptions are made concerning absorption rates, elimination rates, and patterns of alcohol consumption, including drinking duration and volume consumed. BAC Tracker software runs hundreds of complex calculations combining several published methods for calculating alcohol absorption, distribution, and elimination to provide an accurate, unbiased, and comprehensive BAC profile for any scenario. With its simple user interface, anyone can use BAC Tracker to perform hundreds of combinations of complex calculations in a matter of minutes to generate various reports estimating the plausible ranges of alcohol consumption and BAC results at any point in time for a given scenario.