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BMI Calculator

Calculate Body Mass Index from height and weight. Metric or imperial units. Shows WHO classification (underweight, normal, overweight, obese).

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How it works

  1. 1
    Pick units
    Metric or imperial.
  2. 2
    Enter values
    Height + weight.
  3. 3
    Read result
    BMI + category, instant.

Frequently asked

Is BMI accurate for everyone?

BMI is a rough population-level metric. It does not distinguish muscle from fat, so athletes and bodybuilders often score 'overweight' despite low body fat. For individual health assessment, body composition and waist circumference are more meaningful.

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Tool designed and editorially reviewed by Felix Brübach. Text drafted with AI assistance and reviewed for legal and factual accuracy before publication. Not legal advice — for complex cases, consult a lawyer.
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