BMI Calculator
Evaluate your Body Mass Index (BMI) against standard clinical health categories and find your recommended healthy weight range.
Associated with lowest risk of cardiovascular conditions and optimal metabolic health markers.
World Health Organization (WHO) BMI Classifications
Standard adult clinical thresholds for both men and women.
Clinical BMI Classifications & Health Markers
The Quetelet Formula
Invented by Belgian statistician Adolphe Quetelet, BMI scales weight relative to height squared:
Imperial: 703 × lbs / (inches)²
A standard healthy adult range established by the WHO is 18.5 to 24.9 kg/m².
Muscle vs. Adipose Tissue
BMI cannot distinguish between lean skeletal muscle mass and adipose body fat.
Strength athletes, bodybuilders, and rugby players frequently register in the overweight or obese ranges despite having single-digit body fat percentages.
Complementary Health Metrics
For comprehensive metabolic assessment, physicians pair BMI with waist-to-height ratio (WHtR), resting blood pressure, fasting glucose, and lipid panels.
Keeping your waist circumference under half your height is a proven guideline for minimizing visceral fat risk.