Blood Alcohol Calculator

Free blood alcohol calculator. Estimate BAC based on drinks, weight, and time. Shows impairment level and time to return to sober state.

Gender

Unit System

Weight (kg)

Number of Drinks

Alcohol Content (%)

Drink Size (ml)

Time Since First Drink (hours)

hrs

🔒 Fast, free math calculators that run in your browser. No uploads, 100% private.