Our Blood Alcohol Content (BAC) Calculator uses the Widmark Formula to estimate your alcohol intoxication level. It accounts for your body weight, gender, the number and type of drinks consumed, and the time elapsed since drinking began. It also estimates how long it will take for your body to metabolize the alcohol and return to a sober state.
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Blood Alcohol Content (BAC) Calculator
Estimate your blood alcohol concentration based on weight, gender, and drinks consumed using the Widmark Formula.
Personal Stats
Drinks Consumed
Estimated BAC
Current Blood Alcohol Content
0.0354%
Buzzing
Feeling of well-being, exaggerated behavior, slight impairment.
Time to Sober
Estimated time until 0.00%
Based on avg metabolism (0.015%/hr)
Legal Limit Check
US Legal Limit (0.08%)UNDER LIMIT
0.00%0.08%0.16%+
Disclaimer
This calculator provides only an estimate based on the Widmark formula. Actual BAC depends on individual metabolism, food consumption, medications, and other factors. Do not rely on this calculator to determine if you are safe to drive. Never drink and drive.
Calculate Blood Alcohol Content (BAC)
Estimate your Blood Alcohol Content (BAC) based on weight, gender, and drinks consumed. See how long until you're sober.
1
Enter Stats
Input your gender and body weight.
2
Add Drinks
Select the type and number of drinks you've consumed.
3
Time Elapsed
Enter how many hours have passed since your first drink.
Key Features
Widmark Formula
Uses the standard forensic science formula for estimating blood alcohol concentration.
Time to Sober
Estimates exactly how many hours until your BAC returns to 0.00%.
Multi-Drink Tracking
Add mixed drinks, shots, beer, or wine with custom volumes and ABVs.
Frequently Asked Questions
No online calculator is 100% accurate. Individual metabolism, food intake, and medications can significantly affect actual BAC.
In the United States and many other countries, the legal driving limit is 0.08% BAC. However, impairment begins much earlier.
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