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BMI Calculator

Calculate your Body Mass Index and understand your weight category

Body Measurements

kg

Your current body weight

cm

Your height in centimeters

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Understanding BMI Calculator

Input Fields Explained

Weight

Your current body weight in kilograms (metric) or pounds (imperial). This is one of the two key measurements used to calculate your BMI.

Height

Your height in centimeters (metric) or inches (imperial). Accurate height measurement is crucial for correct BMI calculation.

Unit System

Choose between Metric (kg/cm) or Imperial (lb/in) based on your preference. The calculator automatically converts and provides accurate results for both systems.

Calculation Formula

Metric Formula:

BMI = Weight (kg) / [Height (m)]²

Height in meters = Height (cm) / 100

Imperial Formula:

BMI = [Weight (lb) / Height (in)²] × 703

BMI Categories (WHO Classification)

UnderweightBMI < 18.5
Normal WeightBMI 18.5 - 24.9
OverweightBMI 25 - 29.9
Obese (Class I)BMI 30 - 34.9
Obese (Class II)BMI 35 - 39.9
Obese (Class III)BMI ≥ 40

Important Considerations

📊 Screening Tool

BMI is a screening tool, not a diagnostic measure of body fatness or health.

💪 Muscle Mass

Athletes or muscular individuals may have high BMI without excess body fat.

👥 Age & Gender

BMI doesn't distinguish between age, gender, or body composition differences.

🏥 Medical Advice

Consult healthcare professionals for comprehensive health assessment.

💡Tip: BMI is a useful indicator for most people, but it has limitations. For a complete picture of your health, consider body composition, waist circumference, lifestyle factors, and consult with healthcare professionals. Healthy weight ranges can vary based on individual circumstances.