- Time to 0.00
- 4.3 h
- Time to legal (0.08)
- 0 h
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How BAC works
Blood Alcohol Content is the percentage of alcohol in your blood. The legal limit for adult non-commercial drivers in every U.S. state except Utah (0.05) is 0.08. Commercial drivers face a 0.04 limit, and drivers under 21 face zero-tolerance.
The body eliminates alcohol at roughly 0.015 BAC per hour. Coffee, food, and water do not speed this — only time does.
Frequently Asked Questions
How long does it take to reach a 0.08 BAC?
For a 150-lb adult, roughly three standard drinks within an hour. Body weight, food, and gender shift the numbers significantly.
What can lower BAC?
Only time. Coffee, food, water, and exercise do not speed the body's elimination rate of about 0.015 BAC per hour.
How accurate is this BAC calculator?
It uses the Widmark formula — a research-grade estimate, but real-world BAC depends on food, medications, hydration, and individual metabolism. Never drive based on a calculator.