Online BMI (Body Mass Index) Calculator


Enter your height and weight and then click the "Calculate BMI" button.


About BMI Calculator

BMI Calculator

This online BMI calculator takes your weight and height as input and calculates your BMI in Kg/m2. BMI can be calculated for either male or female and age starting from 2 years.

Using the BMI calculator

  1. Select your Ethnicity, Sex and Age.
  2. Enter your height in Centimeters (cm) or in Feet (ft.) and Inches (in.).
  3. Enter your weight in Kilograms (Kg) or in Pounds (Lb.).
  4. Then, click the Calculate BMI button. The BMI will be calculated and the result will be displayed in the box below the button.

NOTE: BMI calculator may not provide accurate results for people with muscular body mass and athletic people. So, always consult with your doctor before taking any health and diet decisions

BMI (Body Mass Index)

Body Mass Index abbreviated as BMI is the mass of the human body in kilogram divided by the square of the height in meters. BMI is expressed in kg/m2.


BMI = masskg ÷ heightm2


  • masskg = mass of the human body in kilograms.
  • heightm = height of the human body in meters.

In Metric System

BMI = masslb ÷ heightin2 × 703


  • masslb = mass of the human body in pounds.
  • heightin = height of the human body in inches.

General BMI Range Clasification

BMI in Kg/m2 BMI Category
Less than 15 Highly Severe Underweight
15 to 15.9 Severe Underweight
16 to 18.4 Underweight
18.5 to 24.9 Normal - Healthy Weight
25 to 29.9 Overweight
30 to 34.9 Obese Class 1 (Moderate Obese)
35 to 39.9 Obese Class 2 (Severe Obese)
40 and above Obese Class 3 (Highly Severe Obese)

BMI Range for South Asians

BMI in Kg/m2 BMI Category
Less than 18.4 Underweight
18.5 to 22.9 Normal - Healthy Weight
23 to 24.9 Overweight
25 to 29.9 Obese Class 1 (Moderate Obese)
30 and above Obese Class 2 (Severe Obese)

Page Last Modified On: Jul 15, 2021

Disclaimer: We took every effort to provide higher level of accuracy in the calculators, converters and tools we have added to Tools section. But, we cannot give any guarantee or can be held responsible for any errors, defects, faults or mistakes in any of the calculators, converters or tools. Please see detailed terms of use and liability disclaimer in Terms of Use Page.

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