Estimate blood alcohol concentration using a simplified Widmark-style formula and standard drink assumptions.
This tool is only a rough estimate and must not be used to determine whether you are safe to drive, work, or make medical decisions. Alcohol affects everyone differently. If there is any doubt, do not drive and seek medical advice when appropriate.
BAC Calculator gives you a fast way to run this calculation online and review the result without spreadsheets or manual formulas.
Enter the requested values, review the assumptions, and compare a few different scenarios to understand how the result changes.
This kind of calculator is most useful when you want a quick estimate before making a more detailed decision.
A calculator is most valuable when it helps you move from a rough guess to a concrete decision.
Use the result as a practical estimate and pair it with your own real-world costs, goals, or requirements.
It is designed to give a fast estimate based on the values you enter. Accuracy depends on using realistic inputs and understanding that some real-world variables may not be included.
Use current, realistic numbers and review the result more than once if you want to compare different scenarios or assumptions.
Yes. The calculator runs in the browser and is designed to work on phones, tablets, and desktop screens.