BMI Calculator

Easily calculate your Body Mass Index (BMI) using our free online BMI calculator. Understanding your BMI can help you assess your health status and determine your ideal weight.

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Your BMI Result

Understanding Your BMI

Your Body Mass Index (BMI) is a simple calculation used to assess whether your weight is healthy for your height. It is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). A BMI of 18.5 to 24.9 is generally considered healthy, while a BMI below 18.5 indicates underweight, and a BMI of 25 or higher indicates overweight or obesity.

Use our BMI calculator regularly to track your weight status and stay informed about your health!


BMI Table for Adults

The following table presents the Body Mass Index (BMI) classifications recommended by the World Health Organization (WHO) for adults aged 20 and above. This categorization helps individuals understand their body weight relative to their height.

Classification BMI Range (kg/m²)
Severe Thinness < 16
Moderate Thinness 16 - 17
Mild Thinness 17 - 18.5
Normal 18.5 - 25
Overweight 25 - 30
Obese Class I 30 - 35
Obese Class II 35 - 40
Obese Class III > 40

BMI Table for Children and Teens

The Centers for Disease Control and Prevention (CDC) provides guidelines for assessing BMI in children and adolescents aged 2 to 20. The table below outlines the BMI categories that indicate weight status for this age group.

Category Percentile Range
Underweight < 5%
Healthy weight 5% - 85%
At risk of overweight 85% - 95%
Overweight > 95%