Body Mass Index (BMI) Calculator
Calculate your Body Mass Index to determine if you have a healthy body weight for your height. Understand your BMI category and healthy weight range.
Step 1: Measurement System
Understanding BMI
Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, normal weight, overweight and obesity.
Step 2: Additional Information
BMI Limitations
BMI doesn’t account for muscle mass, bone density, overall body composition, and racial and sex differences. It’s a screening tool, not a diagnostic of body fatness or health.
Your BMI Results
Your Body Mass Index
<18.5
18.5-25
25-30
30+
BMI Categories
| BMI Category | BMI Range (kg/m²) | Health Risk | Action |
|---|
World Health Organization Classification
BMI provides a simple numeric measure of a person’s thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.
Health Information
BMI Formula
BMI = weight (kg) ÷ height² (m)
For metric: Divide your weight in kilograms by your height in meters squared. For imperial: Multiply weight in pounds by 703, then divide by height in inches squared.
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