BMI Calculator
WHO International Standards
BMI (Body Mass Index) Calculator
The BMI Calculator automatically computes your Body Mass Index from your height and weight, and classifies your result according to WHO (World Health Organization) international standards.
BMI Formula
BMI = Weight (kg) ÷ Height (m)²
WHO BMI Classification
- Underweight: BMI below 18.5
- Normal weight: BMI 18.5 – 24.9
- Overweight: BMI 25.0 – 29.9
- Obese: BMI 30.0 or above
FAQ
Q. Is a normal BMI a sign of good health?
BMI is only a reference indicator. Body fat percentage, muscle mass, and waist circumference should also be considered. Athletes with high muscle mass may have a high BMI without being obese.
Q. Does the same standard apply to children?
No. For children and adolescents, age- and gender-specific growth chart percentiles are used instead.