The richest collection of free online calculators—BMI Calculator

BMI Calculator

This Body Mass Index (BMI) calculator can be used to calculate your BMI value and your weight status with age considered. Use the "metric units" tab if you are more comfortable with the international standard metric units. The referenced weight range and the calculation formula were listed following the calculator.

Also check the body fat calculator, calorie calculator.

age  
sex    
height feet inchs
weight pounds
height centimeters
weight kilograms
 

body mass index formula

BMI = weight(kg)/height2(m2)
OR
BMI = weight(lb)/height2(in2)

body mass index table for adult

CategoryBMI range - kg/m2
Severely underweight< 16.5
Underweight16.5 - 18.5
Normal18.5 - 25
Overweight25 - 30
Obese Class I30 - 35
Obese Class II35 - 40
Obese Class III> 40

body mass index chart for adult


body mass index table for children and teens, age 2-20

CategoryPercentile Range
Underweight<5%
Healthy weight5% - 85%
At risk of overweight85% - 95%
Overweight>95%

body mass index chart for children and teens, age 2-20

body mass index chart for boys
body mass index chart for girls

The body mass index (BMI), or Quetelet index, is a statistical measurement which compares a person's weight and height. Though it does not actually measure the percentage of body fat, it is a useful tool to estimate a healthy body weight based on how tall a person is. Due to its ease of measurement and calculation, it is the most widely used diagnostic tool to identify obesity problems within a population. However it is not considered appropriate to use as a final indication for diagnosing individuals.