Substance & Alcohol
Calculate blood alcohol content (BAC), track caffeine intake, count alcohol calories and plan smoking cessation. Free substance awareness tools.
4 free calculators available
Blood Alcohol Calculator (BAC) - Calculate Blood Alcohol Content
Calculate your blood alcohol content (BAC) based on drinks consumed, body weight, gender, and time. Uses Widmark Formula to estimate BAC and time until sober. Learn about alcohol impairment levels, legal driving limits, and safety information.
Caffeine Calculator - Track Daily Caffeine Intake & Effects
Calculate your daily caffeine intake from coffee, tea, energy drinks, and other sources. Track caffeine levels in your body, get personalized safety recommendations, and learn optimal timing for caffeine consumption to improve sleep quality.
Smoking Cessation Calculator - Track Health & Savings After Quitting
Calculate how much money you save and track your health improvements after quitting smoking. See your health milestones, cigarettes not smoked, tar avoided, and life days gained.
Alcohol Calorie Calculator - Calculate Calories in Alcoholic Drinks
Calculate the calories in your alcoholic drinks. See food equivalents, weekly projections, and yearly weight impact. Compare beer, wine, spirits, cocktails, and more.
Substance & Alcohol Calculators
4 substance & alcohol calculators in this category. Each one names the formula it uses and the guideline or study the formula came from — so you can verify the math instead of trusting a black box. Calculations run in your browser; nothing you enter is sent anywhere.
Substance & alcohol numbers are screening tools, not diagnoses. They are useful for spotting outliers and tracking changes over time, less useful for telling you what to do about a borderline result. For that, take the number to a clinician who can read it in the context of your full history.
Available Calculators
- Blood Alcohol Calculator (BAC) - Calculate Blood Alcohol Content — Calculate your blood alcohol content (BAC) based on drinks consumed, body weight, gender, and time. Uses Widmark Formula to estimate BAC and time until sober. Learn about alcohol impairment levels, legal driving limits, and safety information.
- Caffeine Calculator - Track Daily Caffeine Intake & Effects — Calculate your daily caffeine intake from coffee, tea, energy drinks, and other sources. Track caffeine levels in your body, get personalized safety recommendations, and learn optimal timing for caffeine consumption to improve sleep quality.
- Smoking Cessation Calculator - Track Health & Savings After Quitting — Calculate how much money you save and track your health improvements after quitting smoking. See your health milestones, cigarettes not smoked, tar avoided, and life days gained.
- Alcohol Calorie Calculator - Calculate Calories in Alcoholic Drinks — Calculate the calories in your alcoholic drinks. See food equivalents, weekly projections, and yearly weight impact. Compare beer, wine, spirits, cocktails, and more.