BAC Calculator
Calculate your Blood Alcohol Content (BAC) accurately. Fast, private, and precise online tool.
Widmark BAC Estimator
Estimate your Blood Alcohol Concentration based on Widmark's formula
Add Standard Drinks
Physical Profile
Consumption Stats
Legal Disclaimer: Broad mathematical estimates only. Never drink and drive regardless of calculator output.
Safety Analysis
Impairment level & sobriety timeline
0.000
% BAC Level
SOBER
Sobriety Countdown
0.0h
Until 0.00%
Legal Limit (0.08)
Below
Relative Status
Impairment Scale
Sober
Limit
Severe
Safety Guidelines
How to Use BAC Calculator in 3 Easy Steps
1
Step 1
Select your biological gender from the options provided.
2
Step 2
Enter your body weight accurately in lbs or kg.
3
Step 3
Input the number of standard drinks you have consumed.
Frequently Asked Questions
It uses standard physiological formulas (like Widmark's) to estimate your Blood Alcohol Content based on your weight, gender, and alcohol consumed.
While it is considered a highly accurate estimate, individual metabolism, food intake, and liver function can alter real-world results. Always prioritize safety.
The tool's 'time to zero BAC calculator' feature estimates this using the average metabolism rate of 0.015 BAC per hour.
In many regions, the legal driving limit is 0.08%, but impairment often begins well below that level. Always avoid driving if you have been drinking.
Yes, body weight is a crucial factor. The 'BAC calculator by weight' considers how alcohol is distributed differently in various body masses.