Explore our full suite of free, accurate medical and fitness tools designed to help you track and improve your health.
Professional-grade health calculators, completely free and available on any device.
Calculate your Body Mass Index and find out if you are underweight, normal weight, overweight, or obese.
Body WeightFind out how many calories you need per day based on your age, gender, height, weight, and activity level.
NutritionCalculate your estimated due date using your last menstrual period (LMP) based on Naegele's Rule.
PregnancyFind out how much water you should drink every day based on your weight, activity level, and climate.
HydrationCalculate your ideal body weight range using the Hamwi, Devine, and Robinson clinical formulas.
Body WeightFind the best times to wake up or go to sleep based on 90-minute sleep cycles to feel fully refreshed.
SleepCalculate your maximum heart rate and target heart rate zones for optimal cardio training.
FitnessEstimate your body fat percentage using measurements and the U.S. Navy body fat formula.
Body CompositionAll calculations run locally in your browser. We never save your fitness data.
Our tools use standardized medical formulas approved by WHO and expert panels.
No forms to submit, no loading times, and absolutely no registration required.