Blood Alcohol Content Calculator

Enter your details below and get instant results

Enter the weight (lbs) to calculate
Enter the number of drinks to calculate
Enter the hours since first drink to calculate

Blood Alcohol Content Calculator

Our BAC Calculator estimates your blood alcohol content based on the number of drinks consumed, your weight, gender, and time elapsed. This tool is for educational purposes only and should not be used to determine if you are safe to drive.

How to Use

  • Select your gender
  • Enter your weight
  • Enter number of drinks consumed
  • Enter hours since first drink
  • Click Calculate to estimate BAC
Health 2 views Updated: Jul 2026

Formula

BAC = (Drinks × 0.6 × 100 × 1.055 / Weight × r) - 0.015 × Hours (r=0.68 male, 0.55 female)

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