# BMI Calculator: Definition, Formula, Examples and Explanation

Published: 5/13/2021 Last updated: 3/2/2023

BMI or Body Mass Index is a measure of a person's body fat based on their weight and height. It is a simple and quick way to assess whether someone has a healthy body weight or not. It is commonly used by doctors, nutritionists, and fitness trainers to determine if a person is underweight, normal weight, overweight, or obese. BMI is calculated by dividing a person's weight in kilograms by the square of their height in meters.

## BMI Formula

The formula to calculate BMI is:

BMI = weight (kg) ÷ (height (m))²

For example, if a person weighs 70 kilograms and is 1.75 meters tall, their BMI would be:

BMI = 70 ÷ (1.75)² = 22.9

The result would indicate that this person has a healthy weight since a BMI between 18.5 and 24.9 is considered normal.

## BMI Examples

Here are some examples of BMI calculations:

• A person who weighs 60 kilograms and is 1.60 meters tall would have a BMI of 23.4, which is considered normal weight.
• A person who weighs 80 kilograms and is 1.80 meters tall would have a BMI of 24.7, which is considered normal weight.
• A person who weighs 100 kilograms and is 1.70 meters tall would have a BMI of 34.6, which is considered obese.

## BMI Explanation

The BMI is a measure of body fat based on weight and height that applies to adult men and women. It is not suitable for children, teenagers, pregnant women, or athletes with a high muscle mass since it may not accurately reflect their body fat percentage. BMI is just one of many factors that can be used to assess a person's overall health status. A high BMI is associated with an increased risk of various health problems such as heart disease, diabetes, and high blood pressure. However, BMI should not be used as a diagnostic tool, and a healthcare professional should be consulted for a complete evaluation of a person's health status.

## BMI Question and Answer (FAQ)

#### What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered normal weight, which is associated with the lowest risk of health problems.

#### What is an unhealthy BMI?

A BMI of 25 or higher is considered overweight, and a BMI of 30 or higher is considered obese. Both are associated with an increased risk of various health problems.

#### Is BMI an accurate measure of body fat?

BMI is not a perfect measure of body fat, and it may not be accurate for certain people such as athletes with a high muscle mass. However, it is a quick and easy way to assess body weight and can be a useful tool for screening purposes.

#### How can I improve my BMI?

To improve your BMI, you can try to achieve a healthy weight through a combination of a balanced diet and regular physical activity. Consult with a healthcare professional or a registered dietitian for personalized advice.

## Conclusion

BMI or Body Mass Index is a useful tool for assessing a person's body weight and determining if they have a healthy weight or not. By using the formula, examples, and explanation provided in this article, individuals can calculate their own BMI and understand what it means in terms of their health. However, BMI should not be used as the only tool to assess health, and a healthcare professional should be consulted for a complete evaluation. By taking steps to achieve and maintain a healthy BMI through a balanced diet and regular physical activity, individuals can improve their overall health and reduce their risk of health problems associated with being overweight or obese.

In conclusion, BMI is a helpful tool for individuals to assess their body weight and take steps to improve their health. By using the formula, examples, and explanation provided in this article, individuals can calculate their own BMI and take steps towards achieving a healthy weight and reducing their risk of health problems associated with being overweight or obese.