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BMI Calculator

Body mass index in metric or imperial, with the healthy weight range at your height.

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About the BMI Calculator

Enter height and weight in centimetres and kilograms, or in feet, inches and pounds, and see the body mass index with the World Health Organization's adult categories. It also gives the weight range that counts as healthy at that height, and how far outside it somebody is, which is more useful than the number on its own.

How to use it

  1. 1Choose metric or imperial units.
  2. 2Enter the height and the weight.
  3. 3Read the BMI, the category and the healthy range for that height.

Questions

How much does BMI actually tell me?

It is a screening number for adults, nothing more. It cannot tell muscle from fat, so athletes read high, and it does not apply to children or during pregnancy. Treat it as one rough signal and ask a doctor before acting on it.

Where do the categories come from?

They are the World Health Organization's adult cut-offs: under 18.5 underweight, 18.5 to 25 healthy, 25 to 30 overweight, 30 and above obese.

Are my figures saved or sent anywhere?

No. The calculation happens in this browser tab as you type. Nothing you enter is sent to KuponGuru or stored.

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