BMI Calculator

Calculate body mass index of men & women online


Your BMI is

BMI Category BMI range
Underweight <= 18.5
Normal 18.5 to 25
Overweight 25 to 30
Obesity >= 30

Body mass index - BMI Calculator measures body fat based on height and weight of an individual, male or female, while also taking age into the consideration. Based on the Body Mass Index of a person, we categorize that person to be underweight, normal or overweight. Its easy to use, just measure your weight & height in either metric units(centimeter and kilograms) or in US units(feet and pounds) and enter them in bmi form.

What is BMI and how to calculate BMI?

In simple terms, Body Mass Index (BMI) produces a number calculated from a person's weight and height. It provides a reliable indicator of the individual’s fitness based on BMI. BMI is often used as a screening factor in evaluating one’s fitness. For the same purpose, we have come up with the BMI calculator online.

BMI formula:

In two most used metric systems, BMI is calculated as shown below:

  • Metric Units:
    BMI = weight (in kg) / height (in sq. meter)
  • US/Imperial Units:
    BMI = 703 * weight (in lb) / height (in sq. inch)

Here is Body Mass Index graph:

body mass index graph

How Body Mass Index (BMI) is affected?

There are four factors (major & minor) which affect the basal metabolic rate (BMR):

  • Weight/Mass
  • Height

Correlation of Body Mass Index with the above factors

  • Weight is directly proportional to BMI. That means the heavier you are, the more likely it will be that your BMI is higher.
  • On the other hand, BMI decreases with height.
  • BMI for Men is higher than BMI for women. That's a reason; we have a different BMI calculator for Men and women respectively.

BMI Table for Adults

This is the World Health Organisation's (WHO) recommended body weight based on BMI values for adults. It is used for both men and women, age 18 or older.

Category BMI range - kg/m2
Very severely underweight < 15
Severely underweight 15 - 16
Underweight 16 - 18.5
Normal 18.5 - 25
Overweight 25 - 30
Obese Class I 30 - 35
Obese Class II 35 - 40
Obese Class III > 40

BMI’s relationship with Obesity & Malnutrition:

These days, BMI has become one of the quickest ways to find if you are obese or not under a normal circumstance. The WHO regards a BMI of less than 18.5 as underweight and may indicate malnutrition, an eating disorder, or other health problems, while a BMI equal to or greater than 25 is considered overweight and above 30 is considered obese.

However, BMI varies internationally from continents to different countries. Other minor factors which we might take into account are the food habit, weather, etc.

A person having a higher BMI might be susceptible to one or some of the following diseases:

  • Hypertension
  • Gallbladder disease
  • Coronary heart disease etc. © 2016. All Rights Reserved. About