BMI Calculator

Measuring your Body Mass Index (BMI)

Body mass index

Body mass index (BMI) is a measure you can use to see if you are a healthy weight for your height.

For most adults, an ideal BMI is in the 18.5-24.9 range.

If your BMI is 25 or more, you weigh more than is ideal for your height:

  • 25-29.9 is overweight
  • 30-39.9 is obese
  • 40 or more is very obese

If your BMI is less than 18.5, you weigh less than is ideal for your height.


You can find out what your BMI is by using the BMI calculator.

content provided by NHS Choices

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