BMI Calculator – Calculate Your Body Mass Index

BMI Calculator

BMI is a metric used to determine body fat based on a person’s height and weight. It is applicable to adult men and women.

BMI Calculator

BMI Calculator

Your BMI is:

A BMI between 18.5 and 24.9 is considered normal.

A BMI below 18.5 is considered underweight.

A BMI between 25 and 29.9 is considered overweight.

A BMI of 30 or higher is considered obese.

If your BMI is in the overweight or obese range, consider making lifestyle changes such as increasing physical activity and improving your diet to reach a healthier weight.

Calculate Your Body Mass Index (BMI)

Introduction to BMI

Body Mass Index (BMI) is a widely used, simple, and cost-effective method for determining whether an individual has a healthy body weight for their height. It is an important tool to help people understand their risk for certain health conditions related to body weight, such as heart disease, diabetes, and hypertension. In this article, we will discuss the significance of BMI, how to calculate it, and ways to improve your BMI.

Importance of BMI

BMI is an essential tool that helps medical professionals and individuals assess and monitor their body weight. It can help identify potential health risks, allowing individuals to take preventive measures and make informed decisions about their lifestyle choices. While BMI is not a diagnostic tool, it is a useful indicator of overall health and well-being.

How is BMI calculated?

BMI is calculated using a simple formula that takes into account an individual’s height and weight. The formula is as follows:

BMI = weight (kg) / (height (m))^2

For example, if a person weighs 70 kg and has a height of 1.75 m, their BMI would be calculated as:

BMI = 70 / (1.75)^2 = 22.86

BMI categories

BMI values are grouped into different categories that indicate the weight status of an individual. These categories include:


A BMI below 18.5 is considered underweight. Individuals in this category may be at risk for malnutrition, weakened immune systems, and other health issues related to low body weight.

Normal weight

A BMI between 18.5 and 24.9 is considered normal weight. This range indicates a healthy body weight for most people and is associated with the lowest risk of health problems related to body weight.


A BMI between 25 and 29.9 is considered overweight. Individuals in this category have an increased risk of developing weight-related health conditions, such as high blood pressure, type 2 diabetes, and heart disease.


A BMI of 30 or higher is considered obese. Obesity is associated with a significantly increased risk of various health issues, including heart disease, stroke, type 2 diabetes, and some cancers.

Factors affecting BMI

BMI can be influenced by various factors, including age, sex, muscle mass, and ethnicity. For instance, older adults typically have a higher body fat percentage than younger individuals, even if they have the same BMI. Additionally, athletes with high muscle mass may have a higher BMI, even though they may not have excess body fat.

Limitations of BMI

While BMI is a useful tool, it has some limitations. It does not directly measure body fat, and it may not accurately reflect the health status of all individuals, such as athletes or older adults. Furthermore, BMI does

not account for differences in body composition between different ethnic groups. Therefore, it is essential to consider other factors and assessments, such as waist circumference and body composition measurements, when evaluating an individual’s overall health.

How to improve your BMI

Improving your BMI involves making changes to your lifestyle, such as adopting a healthier diet, engaging in regular physical activity, and making positive behavioral changes. Here are some strategies to help you improve your BMI:

Dietary changes

Eating a balanced diet that includes a variety of fruits, vegetables, whole grains, lean proteins, and healthy fats can help you maintain a healthy body weight. Avoiding processed foods, sugary drinks, and excessive consumption of high-calorie snacks can also contribute to better weight management.


Engaging in regular physical activity is crucial for maintaining a healthy body weight and improving your BMI. Aim for at least 150 minutes of moderate-intensity aerobic exercise or 75 minutes of vigorous-intensity aerobic exercise per week, along with muscle-strengthening activities on two or more days per week.

Lifestyle changes

In addition to dietary changes and exercise, other lifestyle factors can also influence your BMI. Getting adequate sleep, managing stress, and avoiding tobacco and excessive alcohol consumption can contribute to overall health and well-being.


  1. Is BMI the same for everyone, regardless of age and gender?
    • No, BMI may vary depending on factors such as age, gender, and ethnicity. It is essential to consider these factors when interpreting BMI values.
  2. Can I use BMI to diagnose a health condition?
    • No, BMI is not a diagnostic tool. It is an indicator of potential health risks associated with body weight and should be used in conjunction with other assessments.
  3. How often should I check my BMI?
    • It is generally recommended to check your BMI periodically, such as during annual physical exams, to monitor changes in body weight and potential health risks.
  4. What should I do if my BMI is in the overweight or obese category?
    • If your BMI is in the overweight or obese category, it is essential to consult with a healthcare professional for guidance on adopting a healthier lifestyle, including dietary changes and exercise.
  5. Are there any other methods to assess body weight and composition?
    • Yes, there are several other methods to assess body weight and composition, such as skinfold thickness measurements, bioelectrical impedance analysis, and dual-energy X-ray absorptiometry (DXA). Consult with a healthcare professional to determine the most appropriate method for your specific needs.


In conclusion, BMI is a valuable tool for assessing body weight and potential health risks associated with weight status. While it has some limitations, it can still provide useful insights into an individual’s overall health. By adopting a healthier diet, engaging in regular exercise, and making positive lifestyle changes, individuals can work towards improving their BMI and reducing the risk of weight-related health issues.