How to calculate Body Mass Index

How to calculate Body Mass Index

Body Mass Index is calculated by using the weight and height of a person.It’s a simple formula where  


   kg=person’s weight in kg

m2=height in metres squared

BMI Calculator

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Your BMI is......

less than 18.5:Underweight
18.5 - 24.9:Normal weight
25 - 29.9:Overweight
30 - 34.9:Class I Obese
35 - 39.9:Class II Obese
40 upwards:Class III Obese

A BMI of range 18.5 to 24.9 is healthy.Whereas, an BMI of more than 25.0 is overweight.BMI applies to most adults between 18-65 years.

The standard weight condition associated with BMI ranges for adults are given in the below table.

BMI RangesWeight Condition
Below 18.5Underweight
18.5 – 24.9Normal or Healthy Weight
25.0 – 29.9Overweight
30.0 and AboveObese

What is BMI?

BMI is a person’s weight in kilograms divided by the square of height in meters. BMI doesn’t measure body fat directly, but research tells that BMI is more related with direct measures of body fat obtained from skinfold thickness measurements, densitometry (underwater weighing), Dual energy X-ray Absorptiometry (DXA) and other methods. In addition,BMI appears to be as strongly correlated with various metabolic and diseases.In general, BMI is a cheap and easy-to-perform way of screening for weight categories.For example.,underweight, normal or healthy weight, overweight, and obesity.


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