About BAC Calculator
The Blood Alcohol Content (BAC) Calculator helps estimate your blood alcohol concentration based on the number of drinks consumed, your body weight, gender, and the time elapsed since drinking. This tool uses the Widmark formula, which is widely accepted for BAC estimation.
Key Features
- • Accurate BAC estimation using scientific formulas
- • Supports both pounds and kilograms
- • Gender-specific calculations
- • Time-based alcohol metabolism
- • Color-coded safety interpretations
BAC Levels Guide
How to Use the BAC Calculator
Select Your Gender
Choose male or female as this affects alcohol distribution in the body.
Enter Your Body Weight
Input your weight in pounds or kilograms. Higher body weight typically results in lower BAC.
Number of Drinks
Enter the total number of standard drinks consumed. One standard drink = 12oz beer (5% alcohol), 5oz wine (12% alcohol), or 1.5oz spirits (40% alcohol).
Time Elapsed
Enter hours since you started drinking. The body metabolizes alcohol at about 0.015% BAC per hour.
Get Results
Click "Calculate BAC" to see your estimated blood alcohol content and safety interpretation.
⚠️ Important Disclaimer
This calculator provides estimates only and should not be used to determine if you're safe to drive or operate machinery. Many factors affect BAC including food consumption, medications, and individual metabolism. Always use designated drivers or alternative transportation when drinking.