Calculate Your Body Mass Index

BMI Calculator
BMI Calculator

BMI Calculator


Your BMI is:


In pursuing a healthy lifestyle, understanding your body's composition is paramount. Body Mass Index, commonly known as BMI, is a fundamental tool in assessing your body's leanness based on weight and height. This informative guide will let you into the significance of BMI, how to calculate it using our smart BMI calculator, the ranges and charts for different age groups, the risks associated with a high or low BMI, and essential FAQs for maintaining a healthy BMI.

What Is BMI?

BMI Categories Chart

BMI Categories Chart

This static pie chart represents different BMI categories:

  • Underweight (Red)
  • Normal (Green)
  • Overweight (Yellow)
  • Obese (Orange)

Body Mass Index (BMI) is a numerical measure that assesses your body's leanness or fatness by considering your weight concerning your height. It's a screening tool to estimate if an individual is within a healthy weight range. While BMI doesn't accurately measure body fat percentage, it is a helpful indicator of whether you are underweight, average weight, overweight, or obese.

BMI Calculator: Your Path to Understanding

Our BMI calculator is a user-friendly tool that allows you to determine your BMI quickly and accurately. Whether you're a man, woman, teen, or child, this calculator can provide insights into your body's status. You can input your weight in either pounds (lbs) or kilograms (kg) and your height in feet and inches or centimeters for precise calculations.

BMI Ranges and Charts: Interpreting Your Results

Interpreting your BMI value is crucial in understanding your body's health status. A healthcare provider can help you to determine what a healthy BMI is for you and develop a plan to achieve your weight goals. Here are the BMI ranges and charts for different age groups:

For Adults: The World Health Organization (WHO) provides the following BMI categories for individuals aged 20 and older:

CategoryHealthy BMI Range (kg/m²)
Severe Thinness< 16
Moderate Thinness16 – 17
Mild Thinness17 – 18.5
Normal18.5 – 25
Overweight25 – 30
Obese Class I30 – 35
Obese Class II35 – 40
Obese Class III> 40

For Children and Teens: The Centers for Disease Control and Prevention (CDC) characterizes BMI measurements for children and teenagers as follows:

CategoryPercentile Range
Underweight< 5%
Healthy weight5% – 85%
At risk of overweight85% – 95%
Normal18.5 – 25
Overweight> 95%

BMI Chart for Kids & Teens (Boys):

BMI Chart

BMI Chart


BMI < 18.5


BMI 18.5 - 24.9


BMI 25 - 29.9


BMI ≥ 30

Risks of a High BMI (Overweight)

Early detection and treatment can help to improve outcomes and reduce the risk of complications. If your BMI falls within the overweight category (25 kg/m² or higher), you may be at risk of developing several health issues, including:

  • Cardiovascular diseases (heart and blood circulation problems)
  • Gallbladder disease
  • High blood pressure (Hypertension)
  • Type 2 diabetes
  • Osteoarthritis
  • Certain types of cancer, such as colon and breast cancer
  • Mental health disorders and depression

Risks of a Low BMI (Underweight)

Eating a healthy diet and getting regular exercise can help to promote weight gain and improve overall health. Conversely, if your BMI indicates that you are underweight, you may face potential health risks, including:

  • Respiratory diseases
  • Digestive issues
  • Cancer
  • Osteoporosis
  • Compromised immune function

FAQs: Your BMI Queries Answered

BMI is not a perfect measure of body fatness, but it is a useful tool for screening large populations. A healthcare provider can use other methods, such as bioelectrical impedance analysis or skin fold calipers, to get a more accurate measure of body fat percentage.

What's a Good BMI for All Ages?

There isn't a universally "good" BMI value, as ideal ranges can vary among individuals. You can determine your BMI by using our BMI calculator to gain insights into your specific category.

How to Maintain a Healthy BMI?

Maintaining a healthy BMI necessitates a combination of factors:
Engage in regular exercise for at least 60 to 90 minutes.
Stay hydrated and follow a balanced diet.
If your BMI is not within the healthy range, consider reducing your caloric intake and increasing physical activity.

Is BMI the Most Accurate Measure of Body Health?

While BMI is a useful tool for assessing general health and identifying weight-related health risks, it has limitations. It does not consider factors like muscle mass, bone density, or distribution of fat. Therefore, a person with a high muscle mass may have a higher BMI without being overweight. For a comprehensive assessment of health, it's advisable to consult with a healthcare professional who can consider multiple factors.

Can BMI Be Misleading for Athletes and Muscular Individuals?

Yes, BMI can be misleading for athletes and individuals with high muscle mass. Muscle weighs more than fat, so a person with a significant amount of muscle may have a higher BMI, even though they have a low percentage of body fat. In such cases, other measurements like body fat percentage or waist-to-hip ratio may provide a more accurate assessment of their health.

Does BMI Account for Age and Gender Differences?

BMI calculations do not directly account for age and gender. However, there are separate BMI categories for children, adolescents, and adults because healthy BMI ranges can vary with age. Additionally, some healthcare providers may adjust BMI interpretations based on gender and age when assessing individuals.

Disclaimer: Understanding the Numbers

It's important to note that the BMI calculator and the information provided are intended for educational purposes and estimations only. While BMI is a valuable tool, it does not replace professional medical advice, diagnosis, or treatment. For personalized health guidance and to achieve your ideal weight and health goals, it's advisable to consult with a healthcare provider.



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