Caculating your Body Mass Index (BMI)

Body mass index or BMI is often used to provide a simple calculation as to whether you need to lose weight.

calculating body mass index

By calculating your height and weight you can tell how healthy your weight is. When using our BMI calculator below please please in mind that:

  • It may overestimate body fat if your athletic or have a muscular build
  • It may underestimate body fat if you’re an older person and have lost muscle mass

How to Calculate your BMI

If you know your height and weight, you can work out which weight range you’re in using the simple steps outlined below:

Powered by BMI Calculator

Please note: A BMI measurement is not as accurate if you’re an athlete or very muscular (muscle weighs more than fat) as this can push you into a higher BMI category even if you have a healthy level of body fat. It’s also not accurate for women who are pregnant or breastfeeding, or people who are frail.

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