Introduction to BMI
Body Mass Index (BMI) is a simple numerical rating used by international health organizations to assess whether an adult weight falls into a healthy category relative to height. Created in the 19th century by Adolphe Quetelet, it has become the standard screening method for public health studies.
The Mathematical BMI Formula
The standard formula divides weight in kilograms by height in meters squared. For imperial measurements, the ratio is multiplied by 703: BMI = (Weight in Pounds / (Height in Inches)^2) * 703.
Standard Weight Classifications
The World Health Organization (WHO) divides adult scores into four primary groups: Underweight (below 18.5), Normal weight (18.5 to 24.9), Overweight (25 to 29.9), and Obese (30 and above).
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