BMI Calculator: body mass index calculation (formula, table)

BMI Calculator: body mass index calculation (formula, table)

Do you know your BMI? With our calculator you can quickly and easily find out your body mass index and possible risks. Is your weight low and do you suffer from malnutrition? Is your weight ideal? Or do you have a problem with overweight and obesity?
Enter your body stats
The calculations are indicative

Formula for calculating BMI

To calculate BMI, a person's weight is divided by the square of their height.

BMI = m/h²

m = body weight in kilograms h = body height in metres

< 18,5 Underweight
18,5-24,99 Optimal weight
25-29,99 Overweight
30-34,99 First degree obesity
35-39,99 Second degree obesity
> 40 Third-degree obesity

The expert guarantor, Andrea Bull, MD, adds the following information: the Body Mass Index was created in the 1840s, before the advent of calculators, when the formula had to be very simple to be usable. It is most accurate for the average person, who is about 165 cm tall. However, there are millions of people who are much shorter, but also a few cm taller. For these people, the outdated formula may be inaccurate, which is why a more accurate formula, the "new BMI", was developed in 2013.

The "new BMI" formula:

  • For weight in kilograms and height in metres:
    • BMI = 1.3 * weight (kg) / height (m)2.5
  • For weight in pounds and height in inches:
    • BMI = 5734 * weight (lb) / height (in)2.5

BMI index

BMI is a shortening of the term body mass index, which loosely translates to body mass index. It tracks a person's nutritional status and provides an indication of their body weight. It indicates the degree of being underweight, overweight, or obese.

Based on the result, the risk of health complications and other problems can be predicted.

The advantage of the BMI is the speed of finding the result with a minimum of data required. Height and weight are usually known by everyone.

However, BMI is not as accurate a method as other forms of measurement.

Why, you ask?

An athlete, bodybuilder, bodybuilder will have a high BMI value. But such a value is not accurate. A person with a lot of muscle can have a BMI higher than 30 points and still not be obese.

For the general population, it is a smart, easy and quick way to determine the level of nutrition. The BMI serves as a warning of possible health problems that result from malnutrition or, conversely, overweight and obesity.

Classification Values / grades
Malnutrition < 18.5 / low BMI
severe malnutrition < 16
moderate malnutrition 16-16,99
mild malnutrition 17-18,49
normal weight 18.5-24.99 / normal BMI
overweight ≥ 25 / high BMI
slightly overweight 25-29,99
obesity ≥ 30
Grade 1 obesity 30-34,99
obesity grade 2 35-39,99
Grade 3 obesity ≥40

Other useful calculators:

Read also:

Important notice:

Please remember that the results of our health calculators and analyzers are for guidance purposes only. They are not a substitute for a professional examination or the advice of a doctor, pharmacist or other health care professional.

Each person is unique, and everyone's needs may vary. Calculators and analyzers have limitations and do not provide a comprehensive individual view of health.

Their use is at your own risk. Neither the site operator nor the author is responsible for misuse and misinterpretation of information obtained through their use. By using the calculators and analyzers, you agree to these terms and conditions and neither the operator nor the author shall be liable for any consequences.

You are advised to consult a professional for your medical condition. Remember that health is an important topic and any decisions should be made in consultation with a professional.

This calculator/analyzer is not a medical tool or medical aid. Consult your doctor about your health problem.

Embed this calculator on your site for free

Simply copy the HTML code to your page. The code is copied in the same way as the embed code of the youtube video. If you have wordpress, you can put it in the HTML field.
The requirement for embedding the calculator is to place the source and dofollow link as specified in the code.

<script src="" async></script><iframe id="medicspark-bmi-calculator-calculate-body-mass-index-formula-table" class="medicspark-calculator-iframe" src="" style="border: 0;overflow: hidden;width: 100%" scrolling="no"></iframe><a class="medicspark-calculator-copyright" href="">BMI Calculator: body mass index calculation (formula, table) from - view explanations and details</a>
fshare on Facebook