Calculate Age from Date of Birth (age) Calculate Body Mass Index (bmi) Basal Metabolic Rate (BMR) (bmr) Body Fat from Skinfold Measurements (bodyfat) Body Fat from Weight and Height (bodyfat2) Calorie Calculator (calorie_needs) Calculate Creatinine Clearance (crcl) Heart Condition Assessment (heart) Target Heart Rate (target_heart_rate) Water Intake Calculator (water_intake) Zung Self-Rating Depression Calculator (zung)