BMI Calculator

Modify the values and click the Calculate button to use

Metric Units
US Units
ages
cm
kg
BMI = 20.1 kg/m² (Normal)
Underweight Normal Overweight Obese
  • Healthy BMI range: 18.5 kg/m² - 25 kg/m²
  • Healthy weight for the height: 59.9 kg - 81.0 kg
  • BMI Prime: 0.8
  • Ponderal Index: 11.1 kg/m³

The Body Mass Index (BMI) Calculator can be used to calculate BMI value and corresponding weight status while taking age into consideration. Use the "Metric Units" tab for the International System of Units or the "US Units" tab to convert units into either US or metric units. Note that the calculator also computes the Ponderal Index in addition to BMI, both of which are discussed below in detail.

BMI Introduction

BMI is a measurement of a person's leanness or corpulence based on their height and weight, and is intended to quantify tissue mass. It is widely used as a general indicator of whether a person has a healthy body weight for their height. Specifically, the value obtained from the calculation of BMI is used to categorize whether a person is underweight, normal weight, overweight, or obese depending on what range the value falls between.

BMI Table for Adults

This is the World Health Organization's (WHO) recommended body weight based on BMI values for adults. It is used for both men and women, age 20 or older.

Classification BMI range - kg/m²
Severe Thinness < 16
Moderate Thinness 16 - 17
Mild Thinness 17 - 18.5
Normal 18.5 - 25
Overweight 25 - 30
Obese Class I 30 - 35