What is BMI?


The Body Mass Index (BMI) is a tool that can be used to tell how healthy a person's weight is.  You can use the BMI to find out if you're a healthy weight for your height.

The BMI weight ranges for adults, as set out by the World Health Organisation (WHO), are outlined below.

• If your BMI is less than 18.4, you're underweight for your height.
• If your BMI is between 18.5 and 24.9, you're an ideal weight for your height.
• If your BMI is between 25 and 29.9, you're over the ideal weight for your height.
• If your BMI is between 30 and 39.9, you're obese.
• If your BMI is over 40, you're very obese.

If you have a BMI of over 25, you need to think about losing weight because you have an increased risk of developing serious health problems, such as heart disease, diabetes, and several forms of cancer.

If your BMI is over 30, you need to make some immediate changes to your lifestyle in order to lose weight. NHS Direct can provide you with advice about how to lose weight safely, but you should also make an appointment to see your GP.

If your worried about your weight you should speak to your doctor who will be able to give you advice on healthy eating.

BMI calculator 

To calculate your BMI Click Here!

NHS Choices