BAC & Sobriety Calculator
Estimate your Blood Alcohol Content (BAC) using the Widmark formula. Enter gender, weight, and drinks consumed to see intoxication level, sobriety countdown, and driving safety warnings.
How to use
- 1Select gender and enter body weight
- 2Set the time you started drinking
- 3Add number of each drink type (beer, wine, spirit, cocktail)
- 4View BAC level, intoxication status and sobriety countdown
Frequently Asked Questions — BAC & Sobriety Calculator
How accurate is the Widmark formula?+
The Widmark formula provides an estimate with ±20% variance from actual BAC due to individual differences in alcohol absorption, metabolism, food intake, and health status. Always use a certified breathalyzer for legal purposes.
How long does it take to sober up?+
The liver metabolizes alcohol at approximately 0.015% BAC per hour — roughly one standard drink per hour. Nothing can speed up this process. Coffee, cold showers, and food only treat symptoms, not the blood alcohol level.
What is the legal BAC limit for driving?+
Limits vary by country: USA/Canada/Australia — 0.08%, UK — 0.08% (Scotland 0.05%), EU most countries — 0.05%, Vietnam — 0.00% (zero tolerance). Always check local laws before driving.
Can I speed up sobering up?+
No. Only time reduces BAC. The liver processes alcohol at a constant rate regardless of what you eat or drink. Eating before drinking slows absorption but does not change the final BAC.