Free Health Calculators
Free, instant health and fitness calculators — BMI, calories (TDEE), macros, body fat, water intake, sleep, and more. No sign-up required.
BMIBody Mass Index from height and weight.TDEE / CaloriesDaily calories you burn (Mifflin-St Jeor).Body FatBody-fat % from tape measurements (US Navy).Water IntakeHow much water to drink per day.SleepBest bedtimes using 90-minute cycles.MacrosProtein, carbs & fat targets for your goal.Calorie DeficitCalories to eat to lose weight.Ideal WeightHealthy weight range for your height.BMRCalories burned at complete rest.Protein IntakeDaily protein target for your goal.Calories BurnedCalories burned by activity & time.Heart Rate ZonesTarget heart-rate training zones.One-Rep MaxEstimate your 1RM from reps.Waist-to-Hip RatioBody-shape health risk indicator.Fasting WindowYour eating & fasting windows.OvulationFertile window & ovulation day.PeriodPredict your next period dates.