Free tools for the numbers that matter · No signup needed

BAC Calculator

A rough Widmark estimate relates grams of alcohol to body weight and a distribution factor, then subtracts an assumed hourly elimination rate.

This calculator is free to use. Enable JavaScript to enter your values and see a result instantly.

How it works

A rough Widmark estimate relates grams of alcohol to body weight and a distribution factor, then subtracts an assumed hourly elimination rate.

Worked example

Two standard drinks can affect people very differently.

Keep in mind

Never use an estimated BAC to decide whether to drive or perform a safety-critical task.

See the original calculator · More health calculators