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BMI Calculator

Calculate your Body Mass Index and see which WHO category it falls into.

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BMI
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Category
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Healthy weight range

For informational purposes only — not professional advice.

How it works

Enter your height and weight in metric or imperial units to calculate your Body Mass Index (BMI) and see the World Health Organization category it falls into, along with a healthy weight range for your height.

BMI is a simple screening measure, not a diagnosis — it doesn't account for muscle mass, bone density, age or sex. For informational purposes only; talk to a healthcare professional for personal advice.

FAQ

How is BMI calculated?

BMI = weight (kg) ÷ height (m)². For imperial units the formula is adjusted accordingly.

Is BMI accurate for everyone?

No — it can be misleading for athletes with high muscle mass, older adults, and children, since it doesn't distinguish muscle from fat.

What are the WHO BMI categories?

Underweight (below 18.5), normal weight (18.5–24.9), overweight (25–29.9), and obese (30 and above).