Understand your weight
Simple BMI or an additional waist-to-height assessment. A screening tool, not an automatic diagnosis.
For women and men aged 20 or over. The BMI formula is the same for both. This tool is not for pregnancy or people under 20.
Measurements are calculated on this page. This form does not send or save them.
Frequently asked questions
Is BMI different for women and men?
The standard adult formula and categories are the same. Body composition and medical circumstances matter when interpreting the result.
Does a high BMI mean I must have surgery?
No. Treatment history, other illnesses, risks and personal preferences need medical assessment.
Can this be used during pregnancy or for children?
No. This version is for non-pregnant adults aged 20 or over. Children and adolescents need age- and sex-specific charts.