Blood alcohol charts can be found on several web sites concerned with drinking and driving issues, such as Be Responsible About Drinking, DrivingLaws.org, and some department of motor vehicle sites. The blood alcohol level chart is used to determine a person's blood alcohol content.
Although blood alcohol level charts are useful indicators for the level of alcohol in a person’s body, such charts should only serve as a reference and not be relied upon to determine whether a person is legally intoxicated. There are many factors that affect a person’s blood alcohol concentration. Some factors include a person's size, gender, physical condition, what they have had to eat, how much sleep they have had, what medications they are taking and the actual alcohol content of the beverage they selected.