About Blood Alcohol Content (BAC) & Sobriety Estimator
Scientific Blood Alcohol Content (BAC) calculator using the Widmark formula. Calculates estimated BAC based on gender, body weight, drinks consumed, and time elapsed. Includes international legal driving limits for USA, UK, Europe, and Australia.
Key Capabilities & Features
- Scientific Widmark formula with gender body water ratio
- Drink presets: Beer, Wine, Spirits, Hard Seltzer, Cider
- Hours countdown until 0.00% completely sober
- USA/Canada (0.08%) & Europe/Australia (0.05%) driving limits
- Visual impairment stage guide
How to Use Blood Alcohol Content (BAC) & Sobriety Estimator
Select Body Profile
Choose biological sex (male/female) and enter body weight in lbs or kg.
Add Drinks
Select your drinks (beer, wine, cocktails, shots) and set the elapsed hours.
Check Sobriety
Review your estimated BAC %, hours until 0.00% sober, and legal driving limit status.
Privacy & In-Browser Execution Guarantee
Private, local calculation. Drink logs and sobriety estimates remain strictly on your device.
Frequently Asked Questions
How accurate is the Widmark formula?
The Widmark formula is the gold-standard forensic model for estimating BAC. However, individual metabolism varies based on stomach contents, genetics, liver health, and hydration.
What is the legal driving BAC limit?
In the United States and Canada, the limit is 0.08%. In the UK (England/Wales), it is 0.08%. In Scotland, Australia, and most of Continental Europe, the limit is 0.05%.