BMI & waist-to-height

This tool gives general information only. It is not a diagnosis or medical advice and does not replace care from your doctor, nurse practitioner, midwife, dietitian or pharmacist. Your answers are calculated in your browser and are never sent to us or stored.

BMI does not measure body fat directly and does not account for muscle, age, sex or ethnicity. It does not apply in pregnancy or to people under 18. People of South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean background may have higher health risks at lower BMIs.