BMI Calculator
Calculate your Body Mass Index in metric or imperial units and see your weight category.
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BMI
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Category
How to use
- Choose metric (cm/kg) or imperial (ft-in/lb) units.
- Enter your height and weight.
- Read your BMI value and the category it falls into.
Frequently asked questions
How is BMI calculated?
BMI = weight (kg) ÷ height (m)². For imperial units the tool converts your input first. It is a screening figure, not a diagnosis.
What are the BMI categories?
Under 18.5 is underweight, 18.5–24.9 is normal, 25–29.9 is overweight, and 30 or above is in the obese range (adult ranges).
Is BMI accurate for everyone?
BMI does not distinguish muscle from fat, so it can misclassify very muscular or older individuals. Treat it as a rough guide and consult a professional for advice.
🔒 This tool runs entirely in your browser. Nothing you enter is uploaded, logged, or stored.
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