BMI calculator

Mobile Number
Age (Years)ages 2 - 120
Weight (Kg)

Result BMI = 0

16 17 18.5 25 30 35 40 Underweight Normal Overweight Obesity BMI 0


  • Underweight : less than 18.5
  • Normal weight : 18.5 and 24.9
  • Overweight : 25 and 29.9
  • Obesity :
    • Class I: BMI between 30 and 34.9
    • Class II: BMI between 35 and 39.9
    • Class III: BMI 40 or higher (also known as morbid obesity)


Body Mass Index (BMI) is a widely used measurement that provides an indication of a person's body composition based on their height and weight. It is a simple yet valuable tool used to assess if an individual is underweight, normal weight, overweight, or obese. Understanding BMI and its usefulness can help you gauge your overall health and make informed decisions regarding your weight management.

BMI is calculated by dividing a person's weight in kilograms by the square of their height in meters. The resulting number indicates the individual's BMI value, which falls into specific categories that correlate with different weight ranges. These categories serve as a starting point for understanding one's weight status and potential health risks associated with it.

The usefulness of BMI lies in its ability to provide a quick and accessible assessment of an individual's weight relative to their height. It can act as a screening tool to identify potential weight-related health issues and provide a general indication of body fat levels. However, it's important to note that BMI is a rough estimate and does not take into account other factors such as muscle mass, bone density, and distribution of body fat.

Despite its limitations, BMI remains a valuable metric for population-level health assessments and research studies. It helps healthcare professionals and individuals gain insights into weight-related health risks and can be used as a starting point for further discussions about lifestyle changes, weight management goals, and overall well-being.

By understanding your BMI and its implications, you can take proactive steps towards maintaining a healthy weight and minimizing potential health risks associated with excess body weight. It serves as a valuable reference point to assess progress on your weight loss or weight gain journey and can be used in conjunction with other health indicators for a more comprehensive evaluation of your overall health.

Remember, BMI is just one tool in the toolbox of health assessment, and it should be considered alongside other factors such as body composition, fitness level, and individual health goals. Consult with a healthcare professional or registered dietitian to get a more personalized evaluation and guidance on managing your weight and maintaining optimal health.

Frequent Asked Question(FAQS)

  • Question : Is BMI a definitive measure of body fat or health?

    Answer : BMI is a useful screening tool for assessing body weight, but it does not directly measure body fat percentage or overall health. Other factors such as muscle mass, body composition, and individual health conditions should also be considered.

  • Question : Can BMI be different for different age groups?

    Answer : Yes, BMI values can vary for different age groups. The interpretation of BMI categories may be different for children, adolescents, and older adults. It is important to consider age-specific BMI charts or consult with a healthcare professional for accurate assessment.

  • Question : Is BMI applicable to athletes or individuals with high muscle mass?

    Answer : BMI may not accurately reflect body composition for individuals with high muscle mass, such as athletes. Since muscle weighs more than fat, their BMI may indicate overweight or obesity, even though they have a low body fat percentage. In such cases, additional assessments may be needed to determine overall health and body composition.

  • Question : What is the relationship between BMI and weight loss?

    Answer : BMI can be a helpful indicator when setting weight loss goals. By tracking changes in BMI, individuals can monitor their progress and determine if they are moving towards a healthier weight range.

  • Question : Can weight loss improve BMI?

    Answer : Yes, weight loss can positively impact BMI. When individuals lose weight, their BMI may decrease, indicating a healthier body weight and reduced risk of certain health conditions associated with higher BMI levels.