BAC Calculator
Know Your Level in Minutes
Science-based blood alcohol estimation with clear explanations and safety insights.
Select Your Sex
Enter Your Weight
Add Your Drinks
Your Estimated BAC
Time to 0.00%
~4 hours
Below 0.08%
Now
Why Choose This BAC Calculator?
A science-based blood alcohol calculator that helps you understand your estimated BAC with clear, AI-powered explanations.
Science-Based, Not Guesswork
Built around widely used BAC formulas and public health data, this blood alcohol calculator focuses on clarity and education.
Clear Explanations, Not Just a Number
Our AI assistant explains the BAC range, typical physical and cognitive effects, and how long it may take to reach 0.00%.
Safety-First and Neutral
The tool never tells you that you are "safe to drive" and does not offer medical or legal advice. Designed for awareness, not decisions.
Fast and Private
Everything runs online in seconds. Check your estimated blood alcohol level without creating an account or sharing personal details.
Recovery Time Estimation
Know approximately how long until your BAC reaches 0.00% based on standard metabolism rates.
Visual BAC Effects Chart
Understand typical effects at different BAC levels with our comprehensive visual guide based on public health research.
How It Works
Get your BAC estimate in three simple steps
Enter Your Details
Select sex, weight, and drinking start time.
Add Your Drinks
Input drink types and amounts consumed.
Get Your Results
View your estimated BAC and safety status.
What is BAC Calculator?
BAC Calculator is a simple, science-based blood alcohol calculator that helps you estimate your blood alcohol concentration after drinking. You enter your sex, weight, what you drank, and when you started drinking — the tool estimates your BAC and our AI assistant explains what that number typically means for your body and recovery time.
Widmark Formula
Scientifically validated BAC calculation method used by researchers worldwide
Public Health Data
Information based on CDC and NHTSA research and guidelines
AI-Powered Insights
Clear explanations of your results in everyday language
Important Notice
This BAC is an estimate only and is not medical, legal, or driving advice. Actual BAC can vary significantly based on many factors including food consumption, medications, metabolism, and individual tolerance. The tool is designed to support awareness, not decisions. When in doubt, do not drive.