Blood Alcohol Calculator

Blood Alcohol Calculator. Estimate BAC from drinks consumed. Fast, accurate, private.

Simplified Widmark estimate — not for legal driving decisions.

Body weight

Number of drinks

Drink volume (ml)

ABV %

Hours since first drink

Estimated BAC

0.029%

Uses ~0.015%/hr elimination. Educational only.

Steps

Blood alcohol content (BAC) calculator — estimate level from drinks, weight, sex, and time.

Are results official?

No — quick estimates only. Confirm with your bank or provider.

Is data saved?

No. Calculations run in your browser.

Where is the full tool?

Each satellite links back to the main hub calculator.