BMI Calculator

BMI Categories:

  • Underweight: BMI < 18.5
  • Normal weight: BMI 18.5 - 24.9
  • Overweight: BMI 25 - 29.9
  • Obesity: BMI ≥ 30
    • Class 1 Obesity: BMI 30 - 34.9
    • Class 2 Obesity: BMI 35 - 39.9
    • Class 3 Obesity: BMI ≥ 40 (Severe/Morbid Obesity)

BMI (Body Mass Index) is a simple calculation used to assess whether a person has a healthy body weight in relation to their height. It’s commonly used to screen for weight categories that may lead to health issues, but it’s not a direct measure of body fat.

BMI doesn't differentiate between muscle and fat. A muscular person may have a high BMI but low body fat.

1. Metric Units (kg/m²):

BMI = weight (kg) / height (m)2

- Weight is measured in kilograms (kg).

- Height is measured in meters (m).

2. Imperial Units (lbs/in²):

BMI = (weight (lbs) × 703) / height (in)2

- Weight is measured in pounds (lbs).

- Height is measured in inches (in).

Important Considerations:

  • Body Composition: BMI doesn’t differentiate between muscle and fat. A muscular person may have a high BMI but low body fat.
  • Age and Gender: BMI does not account for differences in body composition due to age, gender, or fitness levels.
  • Health Indicators: BMI can give a rough idea about weight-related health, but it’s best used alongside other measurements (e.g., waist circumference, body fat percentage, or health screenings).