This tool will only give accurate BMI results for adults aged 18 years and over.
Entering your ethnic background will give you more accurate advice about your BMI. It will not be used for data collection.
People from an Asian, Black African, African-Caribbean or Middle Eastern ethnic background have a higher chance of developing health problems related to their BMI.
A lower BMI range is used to define the overweight and obese categories for people from any of these ethnic backgrounds.