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Calculate Body Mass Index and healthy weight classifications using metric or imperial standards.
Estimate body fat percentage and lean muscle mass using the U.S. Navy circumference method.
Calculate daily maintenance calories (TDEE) and caloric target deficits for structured weight loss.
Compute Basal Metabolic Rate using the Mifflin-St Jeor formula to determine resting energy expenditure.
Find healthy body weight ranges across leading clinical formulas (Devine, Robinson, Miller, Hamwi).
Estimate delivery dates, current gestational weeks, and developmental trimester progressions.
Calculate estimated baby delivery date using conception date, IVF transfer, or last menstrual cycle.
Predict upcoming fertile windows and ovulation days according to menstrual cycle duration.
Determine recommended daily hydration volume based on body weight and daily activity level.
Compute custom macronutrient distributions (protein, carbohydrates, and fats) tailored to fitness goals.
Identify target training heart rate zones for fat burning, aerobic endurance, and anaerobic conditioning.