At what blood alcohol level are you considered legally drunk?

• The normal blood alcohol level is 0 (zero).
• There are various different terminologies for reporting a blood alcohol level. Each of the following has the same meaning - 80 milligrams/dL, 80 grams per cent, 80 mg/100ml, or 0.08.
• In the U.S. the legal definition of alcohol intoxication varies from state to state: 80 mg/ dL - 100 mg/dL.
• In Canada it is a criminal offense to operate a car while having a blood alcohol level greater than 80 mg/dL (0.08). Some Canadian provinces have sanctions (suspensions) for levels greater than 50 mg/dL (0.05).
• Drinking 3-4 drinks is sufficient to make an average-sized person legally drunk.