What is BMI?

The body mass index (BMI) is a measure of weight relative to height and is commonly used to classify underweight, overweight and obesity in adult men and women. It is defined as the weight in kg divided by the square of the height in metres. It is pertinent to note that BMI calculation (formula) is age-independent and the same for both sexes. However, for children below 19 years of age, BMI values are interpreted based on sex- and age-specific percentiles.

BMI Table

BMI is a good indicator of obesity. The following table summarizes the nutritional status of adults according to BMI values.

BMI Classification (Source: WHO)
Body Weight BMI Range
Underweight <18.50
Normal weight 18.50 - 24.99
Pre-obesity 25.00 - 29.99
Obesity class I 30.00 - 34.99
Obesity class II 35.00 - 39.99
Obesity class III >=40.00

BMI Calculator

Use this calculator to quickly find your BMI. Height and weight values may be entered either in metric or imperial units. Download our Android App from play store.

Metric Imperial
Height: cm
Weight: Kg
Height: ft in
Weight: lb

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