Health Calculators

Science-backed calculators to understand your body and optimize your nutrition. All formulas use clinically validated equations.

Body Mass Index (BMI)

BMI is a simple screening tool based on height and weight. It doesn't measure body fat directly but correlates with health risk levels.

Weight (kg)

Height (cm)

Formulas used

BMI:weight (kg) / height (m)² — World Health Organization standard
BMR:Mifflin-St Jeor Equation (1990) — most accurate for adults within ±10%
TDEE:BMR × Activity Multiplier (Harris-Benedict activity factors)
Water:33ml per kg bodyweight × activity adjustment — European Food Safety Authority baseline