FitFormulas

BMI Calculator

A quick screen from weight and height.

Private by design — everything is calculated on your device, nothing is stored
kg
cm

Try: Weight=70, Height=170 → 70 kg, 170 cm, 24.2, Normal

How to use

Body Mass Index is weight divided by height squared. The WHO bands it into underweight, normal, overweight and obese. It is a population screen, not a body-composition measure.

Formula

BMI = weight(kg) / height(m)²

FAQ

Why does BMI miss muscle?

Heavy muscle raises BMI without extra fat, so athletes can read "overweight".

What are the WHO cut-offs?

Under 18.5, 18.5–24.9, 25–29.9, 30+.

Should I rely on BMI alone?

No — pair it with body-fat or waist measures.

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