BAC Calculator
Designated Driver A person who stays sober to safely drive others who have consumed alcohol.
Frequently Asked Questions
What should I do if a police officer asks if I’ve been drinking?
You have the right to remain silent. Be polite, and if unsure, ask if you're free to leave. Anything you say can be used in court.
Can I refuse a BAC test?
In most states, refusal leads to license suspension and fines—even without a DUI charge. Always know your local laws.
What is a designated driver?
Designated driver refers to the sober person chosen to drive while others drink. It’s a life-saving decision.
BAC (Blood Alcohol Concentration) reflects the amount of alcohol in your bloodstream. For example, a BAC of 0.08% means 0.08 grams of alcohol per 100mL of blood.
In the U.S., the legal BAC limit for drivers over 21 is 0.08%. For those under 21, it's much lower — often between 0.01% and 0.05%, depending on state law.
Alcohol may bring a short-term buzz, however long-term consumption has mixed consequences. Some studies suggest light to moderate drinking may reduce heart disease or stroke risk, but newer findings suggest these benefits may be minor — and come with **notable risks**.
Heavy drinking increases the chance of CVDCardiovascular Disease, liver disease, CNSCentral Nervous System damage, cancer, and more. If you don’t drink now — there’s no reason to start.
| BAC (%) | Behavior | Impairment |
|---|---|---|
| 0.001–0.029 | Appears normal | Minor effects detected only by tests |
| 0.030–0.059 | Mild euphoria, talkativeness | Reduced concentration |
| 0.060–0.099 | Disinhibition, extraversion | Reasoning, perception impaired |
| 0.100–0.199 | Over-expression, slurred speech | Severe motor skills reduced |
| 0.200–0.299 | Emotional swings, blackout | Severe motor impairment |
| 0.300–0.399 | Stupor, unconsciousness | Breathing & heart rate affected |
| 0.400–0.500 | Possible coma | CNS shutdown |
| > 0.500 | Critical condition | High risk Fatal |
Alcohol impairs more than judgment. Drive safe, drink responsible.