BMI Calculator
Enter your height and weight to get your BMI and see which range it falls in.
How to use BMI Calculator
- Choose metric or imperial units.
- Enter your weight and height.
- Your BMI and category — Underweight, Normal, Overweight or Obese — are calculated automatically.
Frequently asked questions
How is BMI calculated?
Metric: weight in kilograms divided by height in meters squared. Imperial: 703 × weight in pounds, divided by height in inches squared. Both give the same BMI value for the same body size.
Is BMI a perfect measure of health?
No — it doesn't distinguish muscle from fat, so it can misclassify very muscular people as overweight, and doesn't account for age, sex, or body composition. It's a quick screening tool, not a diagnosis — talk to a healthcare provider for a fuller picture.
What do the weight categories mean?
Underweight (below 18.5), Normal weight (18.5–24.9), Overweight (25–29.9), and Obese (30 and above) — the standard WHO BMI classification ranges for adults.
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