The human body rids itself of about one alcoholic drink per hour. If a person consumes seven drinks in three hours, how many drinks likely remain in that person’s system three hours after their final drink?

The minimum number of drinks remaining in a person's system can be estimated by subtracting the number of hours since their last drink from the total number of drinks consumed. For example: a person who has consumed seven drinks in three hours would have a minimum of four drinks remaining in their system three hours later.