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BMI Calculator

Body Mass Index from your height and weight, in metric or imperial units.

Everything is worked out in your browser; nothing is sent anywhere or saved.

How to use

  1. Choose metric or imperial units.
  2. Enter your height and weight.
  3. Read your BMI and its WHO category.

About BMI Calculator

BMI Calculator divides weight in kilograms by height in metres squared and places the result in the WHO adult bands: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30 and over obese. Everything is worked out in your browser as you type; nothing is sent anywhere or saved.

FAQs

Is BMI accurate for everyone?

No. It ignores muscle mass, age, sex and build, so athletes and older adults can be misclassified.

Does it work for children?

No. Children and teens need age- and sex-specific BMI charts.

Is this medical advice?

No. Talk to a doctor about your weight and health.

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