BAC by Drinks: Reference Chart (160 lb person)
| Standard Drinks | Approx BAC (man) | Approx BAC (woman) | Effect |
|---|---|---|---|
| 1 drink | 0.02% | 0.03% | Mild relaxation |
| 2 drinks | 0.04% | 0.06% | Lowered inhibitions |
| 3 drinks | 0.06% | 0.09% | Impaired judgment |
| 4 drinks | 0.08% | 0.12% | Legal limit / illegal to drive |
| 5+ drinks | 0.10%+ | 0.15%+ | Significantly impaired |
How Long to Sober Up
The liver metabolizes alcohol at approximately 0.015% BAC per hour — and you cannot speed this up with coffee, food, or water. Those only make you more alert, not less impaired.
To reach 0.00% from 0.08%: 0.08 ÷ 0.015 = 5.3 hours. From 0.15%: 10 hours.
The Legal Limit & Consequences
- 0.08%: Legal DUI limit in all 50 US states for drivers 21+
- 0.04%: Limit for commercial drivers (CDL)
- 0.02%: Limit in most states for drivers under 21
- DUI consequences: license suspension, fines $1,000–$10,000+, possible jail time, insurance rate increase for 3–7 years
Frequently Asked Questions
How accurate is a BAC calculator?
BAC calculators provide estimates based on the Widmark formula. Actual BAC varies with food intake, metabolism, hydration, and medications. Use results as guidance only — never as a definitive safety check.
Does food lower your BAC?
Food slows alcohol absorption but does not reduce BAC that is already in your bloodstream. Eating before drinking slows how quickly alcohol enters your system.
Can I drive if my calculated BAC is below 0.08%?
Legal limits do not equal "safe to drive." Impairment begins at 0.02%. If you feel any effects from alcohol, do not drive. Use a rideshare or designate a sober driver.
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