Blood Alcohol Content (BAC) Calculator
Free BAC calculator. Estimate your blood alcohol content and find out how long it will take to become sober based on your weight and drinks consumed.
Weight significantly affects blood alcohol concentration.
Drinking Session
1 Standard US Drink = 1.5 oz of 40% Liquor = 5 oz of 12% Wine = 12 oz of 5% Beer.
Estimated BAC
0.055%
⚠️ Impaired (Exercise Caution)
Estimated Time Until Sober (0.00% BAC)
~3h 40m
Your body metabolizes approx 0.015% BAC per hour.
Disclaimer: This calculator provides an estimate based on averages (Widmark formula) and should not be used to determine your legal or physical ability to drive. Food consumption, metabolism, and medication can drastically alter your real BAC. Never drink and drive.
How to Use the Blood Alcohol Content (BAC) Calculator
Using our bac calculator is simple and fast. Just follow these steps:
- Determine which calculation mode you need.
- Enter your values into the input fields.
- The result will automatically calculate and display below.
Understanding Your Results
The results provided by this tool are calculated instantly using standard mathematical formulas. If you see an unexpected result, ensure your input values are correctly formatted without any extra characters.