Do I need to sign up?

No. The tool works without an account.

Are my data uploaded?

Compatible operations run locally in the browser.

This is a rough estimate only. Real BAC depends on many factors. Never use it to decide if you can drive.

Approximately 14 grams of pure alcohol (one beer, one glass of wine, or one shot).

Estimate blood alcohol content (BAC) using the Widmark formula from drinks, weight, gender and hours.

Estimated BAC

0.044%

Rough estimate only. Do not use to decide driving.

Standard drinksWeight (kg)GenderHours since first drink

Examples

2 drinks, 70 kg male, 1 h → ~0.044%

3 drinks, 60 kg female, 2 h → ~0.097%

Loading tool…

Recommended next step

After using Blood Alcohol Content Calculator, continue with Aspect Ratio Calculator.

Tools selected to complete the same task.

4 steps

Tool guide

Practical information to understand the result and use this tool correctly.

Estimate blood alcohol content (BAC) using the Widmark formula from drinks, weight, gender and hours.

The tool runs directly in the browser for immediate results.

Do I need to sign up?: No. The tool works without an account.
Are my data uploaded?: Compatible operations run locally in the browser.
How accurate is this?: This is a rough estimate only. Real BAC depends on many factors. Never use it to decide if you can drive.
What is a standard drink?: Approximately 14 grams of pure alcohol (one beer, one glass of wine, or one shot).