BMI Calculator
Calculate your Body Mass Index and understand your weight category
BMI Categories Reference
| Category | BMI Range | Health Risk |
|---|---|---|
| Underweight | Below 18.5 | Malnutrition risk |
| Normal weight | 18.5 – 24.9 | Low risk |
| Overweight | 25.0 – 29.9 | Moderate risk |
| Obese Class I | 30.0 – 34.9 | High risk |
| Obese Class II | 35.0 – 39.9 | Very high risk |
| Obese Class III | 40.0 and above | Extremely high risk |
BMI (Body Mass Index) is a simple screening calculation based on height and weight, used as a rough general indicator of whether someone is in an underweight, healthy, overweight, or obese range. This calculator computes your BMI and shows which health category it falls into.
Frequently asked questions
No - BMI doesn't distinguish between muscle and fat mass, so very muscular individuals can show a "high" BMI despite low body fat, and it doesn't account for body composition, age, or sex differences in detail. It's a useful general screening tool, not a complete health assessment.
Generally: under 18.5 is underweight, 18.5-24.9 is healthy weight, 25-29.9 is overweight, and 30+ is obese - though these ranges are general guidelines, not individual medical diagnoses.
BMI is a useful starting point, but for a complete picture of your health, consider body composition, fitness level, and other factors - consult a healthcare professional for personalized advice.