Estimates your Blood Alcohol Content (BAC) based on the number of drinks consumed, time elapsed, weight, and gender. This is only an estimate; actual BAC can vary.
Start with your values, or try a preset.
Enter Number of Standard Drinks, Hours Spent Drinking, Weight (lbs), and Gender in the units shown.
Read Weight (kg), Gender Constant, Grams of Alcohol Absorbed, Estimated Blood Alcohol Content (BAC), and Driving Recommendation in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
See the inputs and their calculated results.
Number of Standard Drinks: 1; Hours Spent Drinking: 1; Weight (lbs): 180 lbs; Gender: Male
Weight (kg): 81.64656 kg; Gender Constant: 0.68; Grams of Alcohol Absorbed: 14 grams; Estimated Blood Alcohol Content (BAC): 0.237 %; Driving Recommendation: Do not drive. BAC is over the legal limit.
Number of Standard Drinks: 2; Hours Spent Drinking: 2; Weight (lbs): 130 lbs; Gender: Female
Weight (kg): 58.96696 kg; Gender Constant: 0.55; Grams of Alcohol Absorbed: 28 grams; Estimated Blood Alcohol Content (BAC): 0.833 %; Driving Recommendation: Do not drive. BAC is over the legal limit.
Number of Standard Drinks: 5; Hours Spent Drinking: 3; Weight (lbs): 200 lbs; Gender: Male
Weight (kg): 90.7184 kg; Gender Constant: 0.68; Grams of Alcohol Absorbed: 70 grams; Estimated Blood Alcohol Content (BAC): 1.09 %; Driving Recommendation: Do not drive. BAC is over the legal limit.
Explore practical health calculators for BMI, due dates, age tracking, calorie planning, and other everyday estimates.
Continue with another tool on a related topic.
Compare a bone age already assessed by a clinician with chronological age in years and months. This tool calculates the age difference; it does not read X-rays, determine skeletal maturity or diagnose a condition.
Estimates a woman's risk of developing invasive breast cancer over the next 5 years and lifetime. This calculator uses the Gail Model, which considers factors such as age, race, personal history of breast biopsies, family history of breast cancer, and age at first menstrual period and childbirth.
This calculator helps analyze your caffeine intake from coffee, assesses potential health impacts, and provides personalized coffee consumption recommendations. It supports different brewing methods.
Calculates the average arterial pressure during a single cardiac cycle. MAP is considered a better indicator of perfusion to vital organs than systolic blood pressure.
Use the result as an estimate and confirm any medical decisions with a qualified professional.