BAC Calculator
Estimate blood alcohol concentration using a Widmark-style equation.
This page is an editable estimator with realistic defaults so you can model your own situation in minutes.
Estimated BAC uses alcohol consumed, body weight, sex distribution factor, and elapsed time.
Treat the result as a planning estimate and verify important numbers with the relevant official source before acting.
| Weight | 180 lb | |
|---|---|---|
| Sex factor | male |
Assumptions
- This BAC estimate can be very inaccurate.
- Do not use this calculator to decide whether to drive or do anything safety-sensitive.
How this calculator works
Formula used
Estimated BAC uses alcohol consumed, body weight, sex distribution factor, and elapsed time.
Example calculation
Plug in your own numbers and the result updates instantly. Estimated BAC uses alcohol consumed, body weight, sex distribution factor, and elapsed time.
BAC Calculator FAQ
Is this bac calculator medical advice?
No. It is an educational estimate only and should not be used to diagnose, treat, or make medical, nutrition, legal, or emergency decisions.
Why might my real result be different?
Age, sex, body composition, pregnancy, medications, medical conditions, training status, lab methods, and measurement accuracy can all change real-world results.
Should I check these results with a professional?
Yes. Confirm health, nutrition, fitness, kidney function, alcohol, or safety decisions with a qualified professional or official source.