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Blood Alcohol Calculator

Estimate your blood alcohol content. With gender, weight, drinks and drinking duration.

Updated 2025 Data stays local

Note: These calculations are for informational purposes only and do not replace professional tax or financial advice. All information without guarantee.

Frequently Asked Questions

How is blood alcohol content calculated?

BAC is calculated using the Widmark formula: alcohol in grams divided by (body weight times reduction factor -- 0.7 for men, 0.6 for women). The result is blood alcohol in per mille.

What are the legal alcohol limits for driving in Germany?

The legal limit is 0.5 per mille (0.0 for drivers under 21 or in their probation period). From 0.3 per mille, punishment applies if driving ability is impaired. Above 1.1 per mille is absolute unfitness to drive.

What is the Blood Alcohol Calculator?

The blood alcohol calculator estimates blood alcohol content after consuming alcoholic drinks and the expected time to sober up.

How does the Blood Alcohol Calculator work?

Enter sex, weight and drinks consumed. The calculator computes blood alcohol using the Widmark formula: BAC = alcohol amount / (body weight * distribution factor). Hourly metabolism (approx. 0.1-0.15 per mille) shows when you will be sober again.

Key Data and Facts

Widmark factor: men 0.68, women 0.55. Alcohol metabolism: approx. 0.1-0.15 per mille/hour. Driving limit: 0.5 per mille (0.0 for new drivers). Absolute unfitness: 1.1 per mille.

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