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Bodyweight, fitness, nutrition, and medical-adjacent calculators. Educational — not medical advice.
Tap any card to open its calculator page.
Calculate your Body Mass Index using metric or imperial units. Includes a clear category breakdown and what it does (and does not) measure.
Calculate your Basal Metabolic Rate and daily calorie needs
Determine your daily caloric needs based on activity level
Calculate optimal protein, carbs, and fat intake for your goals
Estimate body fat percentage using the Navy measurement method
Calculate your daily hydration needs based on body weight and activity
Calculate your target heart rate zones for different exercise intensities
Calculate optimal bedtimes and wake times based on sleep cycles
Calculate calories burned during different physical activities
Calculate your blood alcohol content based on drinks consumed
Calculate nutrition information for your Chipotle meal
Calculate peptide dosage based on weight and reconstitution
Compare your lifting stats to standard strength categories
Calculate your one-rep maximum based on multiple rep sets
Calculate optimal plate loading combinations for your barbell workouts
Calculate your powerlifting totals, Wilks score, and competition classification
Calculate your Army Combat Fitness Test score across all required events
Calculate kidney function using creatinine levels and patient data
Calculate alcohol by volume in your homebrew or other alcoholic beverages
Calculate due date for IVF pregnancies based on embryo transfer date
Calculate your Fat-Free Mass Index to evaluate lean muscle development
Calculate your Total Daily Energy Expenditure to optimize nutrition goals
Calculate your ideal weight range based on height, gender, and body frame
Calculate your Body Surface Area for medical dosing and treatment applications
Calculate your waist-to-height ratio to assess cardiovascular health risks
Calculate the financial impact of smoking over time
Estimate your life expectancy based on age, sex, smoking, and exercise habits.
All 570 calculators in your pocket. Offline-ready, no ads, no trackers. iOS and Android apps land soon — get notified when they ship.