Calculateur d'IMC

This calculator implements the standard BMI formula defined by the World Health Organization: BMI = weight (kg) / height (m)². The WHO classification system categorizes BMI into: Underweight (< 18.5), Normal weight (18.5-24.9), Overweight (25.0-29.9), Obese Class I (30.0-34.9), Obese Class II (35.0-39.9), and Obese Class III (≥ 40.0). The healthy weight range is calculated by solving the BMI formula for weight at BMI values of 18.5 and 24.9, using the individual's height. Data sources: World Health Organization BMI classification (WHO Technical Report Series 894, 2000). The formula was originally developed by Adolphe Quetelet in the 1830s and adopted by the WHO as a population screening tool. Limitations: BMI does not distinguish between muscle mass and fat mass, making it less accurate for athletes, bodybuilders, pregnant women, the elderly, and growing children. BMI also does not account for ethnic variations — some populations face health risks at lower BMI thresholds. For individuals outside the typical population, body fat percentage or waist circumference may be more informative metrics. BMI is a screening tool, not a diagnostic measure.