Learn about blood alcohol concentration and how it is measured.
Frequently Asked Questions
What is the difference between BAC and BAL?
BAC (Blood Alcohol Concentration) and BAL (Blood Alcohol Level) refer to the same measurement — the amount of alcohol in your bloodstream. BAC is more commonly used in the US, while BAL is used in some medical contexts.
How is blood alcohol measured?
Blood alcohol can be measured through blood tests, breathalyzer devices, or urine tests. Blood tests are the most accurate, while breathalyzers provide quick estimates used by law enforcement.
What factors affect blood alcohol levels?
Key factors include body weight, biological sex, the amount and type of alcohol consumed, drinking speed, food intake, medications, and individual metabolism rate.