Blood Alcohol (BAC) Calculator
Estimate your blood alcohol content (BAC) from the number of standard drinks, body weight, sex and time elapsed, using the Widmark formula. For education only. Private.
Privacy & Security
All processing happens locally in your browser — nothing is uploaded.
How to Use
Enter drinks, weight, sex and hours since your first drink. This is an estimate — never drink and drive.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
Related Tools
Percentage Calculator
MathCalculate percentages instantly — find percentage of a number, percentage change, increase/decrease, and more.
Statistical Calculator
MathCalculate mean, median, mode, standard deviation, and more.
Probability Calculator
MathCalculate probabilities, odds, and combinations.