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BMI Calculator

Body mass index with health category — 100% free, runs in your browser

About the BMI Calculator

Body mass index is a rough screening figure, not a diagnosis. It compares weight to height and nothing else, which is why muscular people often score as overweight. Treat it as one data point among several.

How to use it

  1. Enter your weight in kilograms.
  2. Enter your height in centimetres.
  3. Read your BMI and its category.

Common questions

What is a healthy BMI?

The standard healthy range is 18.5 to 24.9. Some health bodies suggest slightly lower thresholds for South Asian populations.

Why is BMI criticised?

It cannot distinguish muscle from fat, or where fat is carried. Waist measurement often tells a more useful story.

Should I act on this number?

Speak to a doctor rather than acting on a single figure. BMI is a starting point for a conversation, not a verdict.

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