iCalculator

BMI Calculator

Calculate your Body Mass Index and find out what it means for your health.

About the BMI Calculator

BMI (Body Mass Index) is a widely used screening metric calculated from height and weight. It categorizes individuals as underweight, normal, overweight, or obese and helps identify potential weight-related health risks. The calculator supports metric and imperial units for global usability.

How to Use

  1. Enter your weight and select the unit (kg, lbs, or stone).
  2. Enter your height and select the unit (cm, m, or ft & in).
  3. Click Calculate BMI to get your result instantly.
  4. Review your BMI value, category, and healthy weight range shown in the results.

Formula Used

Metric: BMI = Weight (kg) / Height (m)² Imperial: BMI = 703 × Weight (lbs) / Height (inches)²

The metric formula divides weight in kilograms by the square of height in metres. The imperial variant uses a correction factor of 703 to convert pounds and inches to the same scale.

Understanding Your Results

BMI Value Your numerical Body Mass Index. A value between 18.5 and 24.9 is considered healthy for most adults.
Category Underweight (<18.5), Normal (18.5–24.9), Overweight (25–29.9), or Obese (≥30). Each category carries different health risk levels.
Healthy Weight Range The ideal weight range for your specific height, calculated using the healthy BMI range of 18.5 to 24.9.

Important Note

BMI does not distinguish between muscle and fat mass. Athletes and muscular individuals may be classified as overweight despite being healthy. It is one screening tool, not a diagnosis. Factors such as age, sex, ethnicity, and body composition are not reflected in BMI. Consult a doctor for a comprehensive health assessment.

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