Calculators » Health » Body Mass Index

BMI Calculator

Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate body mass index (BMI) given height and weight values. Alternately, you can determine ideal body weight, given your height.

Leave Weight field empty if you want to find the ideal weight for your height

Height (in cm):

Weight (in Kg):

If you use imperial measurement system, use these unit converters for converting to metric equivalent: weight, height

Android: Use this bmi calculator offline with our all-in-one calculator app.

BMI calculation

BMI is a measure of fitness and indicates if you are under-weight, over-weight or of normal weight. The formula for BMI is:

BMI = Weight (in kg) / [Height (in m) * Height (in m)]

The body mass index is simply your body weight (in kilograms) divided by your height (in metres) squared.


BMI Table

BMI Values and Weight Classification - WHO
Classification Cut-off points BMI(kg/m2)
Underweight <18.50
Severe thinness <16.00
Moderate thinness 16.00 - 16.99
Mild thinness 17.00 - 18.49
Normal range 18.50 - 24.99
Overweight >=25.00
Pre-obese 25.00 - 29.99
Obese >=30.00
Obese class I 30.00 - 34.99
Obese class II 35.00 - 39.99
Obese class III >=40.00

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