1. Basic details

2. Drinks selector

US Standard Drinks

17.7ml alcohol

Spirits

Single shot of 40% spirits

Beers

12 fl oz of 5% beer

Wines

5 fl oz of 12% wine

%
No drinks selected yet

3. BAC Results

TBC BAC level
TBC Time until 0% BAC
TBC Time until legal limit (0.08%)
TBC Alcohol consumed

Next step: Understand your results

This tool provides a rough estimate of your BAC levels using a basic version of the Widmark Formula. To gain a better understanding about BAC dissipation rates, take a look at our alcohol metabolism guide which provides further information about how long alcohol stays in your system.

Alcohol Metabolism Info

Disclaimer

This BAC calculator is for information purposes only. There are many variables that mean this tool cannot fully determine your BAC level, and therefore whether an individual is able to lawfully drive a vehicle. We strongly suggest that if you have any alcohol in your body: do not drive.

By using this tool, you acknowledge that any information presented may contain inaccuracies or errors and we expressly exclude liability for any such inaccuracies or errors to the fullest extent permitted by law.

This tool employs a basic version of the Widmark Formula, which can be found below. The variables used in the formula can be expressed as; A = liquid ounces of alcohol consumed, W = your weight in pounds, r = a gender constant (.73 for men and .66 for women) and H = hours since your first drink.

Widmark Formula

%BAC = (A x 5.14 / (W x r)) - .015 x H

Fireball Cinnamon Whisky

Sazerac Company

33.00% | Whisky

Bud Light

AB InBev

4.20% | Pale Lager

Coors Light

Molson Coors Brewing Company

4.20% | Pale Lager

Miller Lite

MillerCoors

4.20% | Pale Lager

Jack Daniel's

Jack Daniel Distillery

40.00% | Tennessee Whiskey

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