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BMI calculator metric

BMI Calculator

Calculate the standard metric BMI number from height and weight.

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Enter your values, then calculate.

Inputs stay in this browser. We record only an anonymous “tool used” event, never your values.

How it works

BMI = weight in kilograms ÷ height in metres squared. It is a broad screening measure and does not capture body composition or individual health.

Three practical tips

  • Use a recent, consistent weight measurement.
  • Interpret the result in context, not as a diagnosis.
  • Speak with a qualified clinician for personal health advice.

Is BMI a medical diagnosis?

No. BMI is a general screening calculation. Health assessment depends on much more than this single number.