Health
Track BMI, Daily Calorie & BMR needs, Ideal Body Weight, and recommended Water Hydration.
BMI Calculator
Calculate Body Mass Index and healthy weight range (Metric & Imperial)
BMR & Daily Calorie Calculator
Calculate Basal Metabolic Rate and daily maintenance calorie needs
Ideal Weight Calculator
Find your target healthy body weight using clinical medical formulas
Water Intake Calculator
Calculate daily recommended hydration based on body weight and activity
Health FAQs
Common questions, calculation formulas, and usage rules for Health.
Body Mass Index is Weight (kg) / [Height (m)]^2. Standard WHO guidelines classify under 18.5 as underweight, 18.5–24.9 as normal, 25–29.9 as overweight, and 30+ as obese. Asian-specific guidelines adjust normal range to 18.5–22.9.
QuickCalcNook uses the widely referenced Mifflin-St Jeor formula adjusted for gender, age, height, and weight, multiplied by your physical activity multiplier (TDEE) for maintenance, deficit, or surplus calories.