BMI Calculator

Calculate your Body Mass Index in seconds. Choose metric or imperial units, see your healthy weight range, and understand what your BMI means.

Height (cm)

Weight (kg)

Understanding Your BMI Results

Body Mass Index (BMI) is a simple calculation using your height and weight that provides a general indicator of body fatness. While it does not directly measure body fat, it offers a useful screening tool for most adults.

BMI Categories (WHO Standards)

Category	BMI Range	Risk Level
Underweight	Below 18.5	Increased risk of nutritional deficiencies
Normal	18.5 – 24.9	Lowest risk for weight-related health issues
Overweight	25 – 29.9	Moderate risk; may benefit from weight management
Obese Class I	30 – 34.9	High risk; increased cardiovascular risk
Obese Class II	35 – 39.9	Very high risk; significant health concerns
Obese Class III	40 and above	Extreme risk; medical consultation recommended

Important Notes

* BMI is a screening tool, not a diagnostic test. It does not measure body fat directly or account for muscle mass, bone density, or body composition.
* Athletes and individuals with high muscle mass may have a high BMI without having excess body fat.
* BMI categories may not apply to pregnant women, elderly adults, or children. Consult a healthcare provider for personalized assessment.
* This calculator provides general information only and is not a substitute for professional medical advice.