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BMI Calculator

A metric and imperial BMI calculator showing the adult BMI category, for reference only.

SIMILAR CALCULATOR

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WHAT IS BMI CALCULATOR?

BMI Calculator supports metric (kg/cm) and imperial (lb/ft-in) units and shows the standard adult BMI category. It is informational only, not a medical diagnosis.

Features

  1. Uses the formula BMI = kg / m² with precise unit conversion.
  2. Category boundaries follow the standard: <18.5, 18.5–24.9, 25.0–29.9, >=30.
  3. Switch between metric and imperial units with one click.

How to use?

  1. Choose metric or imperial.
  2. Enter weight and height.
  3. The result updates instantly — click “Copy result” or “Reset”.

Frequently asked questions

Can this replace a doctor's diagnosis?

No. This is an informational reference calculator only — it is not a medical diagnosis and does not provide personalized treatment or health advice. Consult a healthcare professional for any concerns.

Is the metric/imperial conversion imprecise?

No — pounds-to-kg and feet/inches-to-cm both use standard precise conversion factors before being applied to the BMI formula.

What are the BMI category boundaries?

The standard adult boundaries: below 18.5 is underweight, 18.5–24.9 is normal, 25.0–29.9 is overweight, and 30 or above is obese.

22.9

Normal

This is an informational calculator only — it is not a medical diagnosis and does not provide personalized treatment advice. Consult a healthcare professional for any health concerns.