BAC Calculator

Estimate your blood alcohol concentration from what you drank, your weight, and the hours you sipped — then see when you’ll be back to 0.00%.

Sex (body-water distribution)

Body weight

Drinking period (hours)

Your liver burns about 0.015% BAC per hour.

Number of standard drinks

One standard drink = 12 oz beer (5%), 5 oz wine (12%) or 1.5 oz spirits (40%) — about 14 g of pure alcohol.

Heads-up
This is a math estimate (Widmark formula), not a breathalyzer. Food, hydration, medication and individual tolerance all shift the real number.

🍺 Two input modes

Standard drinks or your own volume & ABV.

🕝 Sober-up timer

Minutes until your estimated BAC hits zero.

🚗 Driving limit check

Instantly compares against the 0.08% rule.

🧾 Honest estimate

Math only — not medical or legal advice.

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