Blood Alcohol Content Estimator
Rough BAC estimate and time to sober, using Widmark.
Your result
This estimate can be wrong by a wide margin. Never drive after drinking: impairment starts well below legal limits, and the limit is 0.08% in most US states and lower elsewhere.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Find this tool when you want to:
Learn more
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Quality and context matter more than raw hours.
Frequently asked questions
What does the Blood Alcohol Content Estimator do?
Rough BAC estimate and time to sober, using Widmark. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: how long until i am sober; can i drive after drinking; blood alcohol level.