This tool will help you estimate your blood alcohol concentration based on your inputs.
How to Use the BAC Calculator
To use this Blood Alcohol Content (BAC) calculator, fill in all fields in the form above:
- Gender: Select your gender.
- Weight: Enter your weight in kilograms.
- Number of Drinks: Enter the number of drinks consumed.
- Alcohol Content: Enter the percentage of alcohol content in the drink.
- Drink Volume: Enter the volume of one drink in milliliters.
- Hours Since Drinking: Enter the number of hours passed since your first drink.
Once all fields are filled, click on the Calculate button to get your estimated BAC shown in the Result field.
How BAC is Calculated
BAC is calculated using the formula:
BAC = ((Drinks x Volume x Alcohol Content x 0.789) / (Weight x Body Water Constant)) * 100 - (Metabolism Rate x Hours)
The grams of alcohol are calculated based on the number of drinks, volume, and alcohol content. This amount is divided by your weight and a gender-specific body water constant. Then, the metabolized alcohol over time is subtracted to give your final BAC.
Limitations
This BAC calculator provides an estimate and should not be used as a legal standard. Individual metabolism rates can vary, and other factors such as medication, food intake, and health conditions can affect BAC. Always drink responsibly and never drive under the influence of alcohol.
Use Cases for This Calculator
Use Case 1: Calculate Your Blood Alcohol Content (BAC)
Enter your weight, gender, number of drinks consumed, duration, and type of drinks to accurately estimate your Blood Alcohol Content (BAC).
Use Case 2: Track Your BAC Over Time
Input your initial BAC, the time elapsed, and your metabolic rate to monitor how your BAC changes over the course of the night.
Use Case 3: Plan Your Safe Driving Time
By entering your current BAC level and your target safe BAC level, you can determine how long you should wait before driving to ensure safety.
Use Case 4: Stay Within Legal Limits
Input your location’s legal BAC limit and monitor your estimated BAC in real-time to make sure you stay within legal driving limits.
Use Case 5: Choose Safer Drinking Options
Experiment with different types and quantities of drinks to see how they affect your BAC levels and make informed decisions on safer drinking options.
Use Case 6: Calculate BAC for Social Events
Before attending social events or parties, estimate your BAC based on the number and type of drinks you plan to have to ensure responsible drinking.
Use Case 7: Track Multiple Users’ BAC Levels
If you’re hosting an event, track the BAC levels of multiple users by entering their information individually, helping you ensure everyone stays safe.
Use Case 8: Adjust BAC Estimates for Food Consumption
Factor in your food intake when calculating your BAC to see how eating affects your estimated blood alcohol content after drinking.
Use Case 9: Monitor Dehydration Impact on BAC
Track how dehydration can influence your BAC levels by adjusting the hydration level in the calculator alongside your drink inputs.
Use Case 10: Educate Others on Responsible Drinking
Share the BAC calculator with friends and family to educate them on the importance of responsible drinking habits and staying within safe BAC limits.