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Blood Alcohol Calculator

Advanced BAC estimator using the Widmark formula. For educational purposes only — never drink and drive.

⚠️ Safety First: This tool provides estimates only. Individual BAC varies by metabolism, food intake, medications, and other factors. Do not drive if you have consumed any alcohol.
Personal Information
Affects Widmark r-factor (0.73 / 0.66)
Alcohol is eliminated at ~0.015% / hr
Drinks Consumed
Quick add:
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Food slows alcohol absorption (applied as a multiplier)
Average: 0.015. Heavier drinkers: up to 0.020
Blood Alcohol Concentration Calculator – BAC Tool