BMI Calculator
Calculate Body Mass Index in metric or imperial units with the WHO category.
| Category | BMI range |
|---|---|
| Underweight | Below 18.5 |
| Normal weight | 18.5 – 24.9 |
| Overweight | 25.0 – 29.9 |
| Obese | 30.0 and above |
BMI is a screening tool, not a diagnosis. It does not account for muscle mass, bone density, age or ethnicity. Speak to a healthcare professional about what these numbers mean for you.
About the BMI Calculator
Enter height and weight in metric or imperial units to get your BMI and the World Health Organization category it falls into, along with the weight range considered healthy for your height.
BMI is a rough screening figure, not a diagnosis — it does not distinguish muscle from fat. Talk to a doctor about what it means for you.
Frequently asked questions
What are the BMI categories?
Under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30 and above obese.
Is BMI accurate for athletes?
Often not. Muscle is denser than fat, so very muscular people can score as overweight while being perfectly healthy.
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