Tools

BAC Estimator

A live, in-browser estimate for alcohol load and projected BAC drop-off. Use simple mode for quick estimates or timeline mode for individual drinks.

Want the math behind the estimate? Read how BAC is estimated.

Educational estimate only. Real BAC varies by body composition, food, health, medication, timing, absorption, and measurement method. This tool is not medical, legal, or transportation advice.

Estimated BAC reaches 0.000

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Enter drink details to estimate a zero time.

Estimated current BAC

0.000%

No alcohol entered.

Standard drinks

0.0

Uses 0.6 fl oz pure alcohol per U.S. standard drink.

Body and timing

Drinks

Projected drop-off

BAC vs. time

Live estimate

Hover or tap the plot to see estimated BAC and local time. Timeline mode models each entry separately.