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BMI Calculator

Calculate adult Body Mass Index from height and weight, with metric, imperial or UK stone units and the standard BMI range.

Your BMI

22.9

Standard healthy range. Standard healthy adult range: 18.5 to 24.9.

UnderweightHealthyOverweightObesity

Estimated healthy weight for this height: 56.7 to 76.3 kg.

BMI is a screening estimate for adults aged 18 and over, not a diagnosis. Do not use this result for children or during pregnancy. BMI can also be less informative for very muscular people, and standard thresholds can differ for some ethnic backgrounds.

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How to use BMI Calculator

  1. 1Choose metric or imperial units.
  2. 2Enter your height and weight.
  3. 3Read your BMI, standard range and estimated healthy-weight range.

Useful tips

  • •Use current measurements for the most useful estimate.
  • •BMI is a screening tool rather than a diagnosis.
  • •Children, pregnancy and high muscle mass need different interpretation.

Frequently asked questions

What formula is used?

BMI is weight in kilograms divided by height in metres squared.

What is the standard healthy range?

For most adults it is 18.5 to 24.9.

Is this medical advice?

No. It is an estimate and not a diagnosis.