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NHS BMI Calculator

Josh DUK

Former Online Community and Learning Manager
Staff member
Relationship to Diabetes
At risk of diabetes
Use this calculator to check your body mass index (BMI) and find out if you're a healthy weight. Or you can use it to check your child's BMI.

BMI uses your height and weight to work out if you're a healthy weight. It doesn’t look at how much fat you have around the middle, so that’s why you need to measure your waist too. You can work your BMI out for yourself using this NHS tool – it will show you your target range.

For many people living with obesity, aiming for a healthy BMI may not be realistic.

Know your waist size​

A healthy waist size depends on your gender and ethnicity. It should be:
  • less than 80cm (31.5in) for all women
  • less than 94cm (37in) for most men
  • less than 90cm (35in) for South Asian men.

Click the link below to use the calculator:
 
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