GPAtlas🧮 Clinical calculator · Diabetes, lipids and hormones
Body mass index (BMI)
Places an adult BMI in the NICE NG246 categories. NG246 sets lower thresholds for several family backgrounds.
Free to use, no account needed. Result: BMI. Last reviewed 29 Jul 2026.
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Before you rely on the result: NICE NG246 sets lower thresholds for people with a South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean family background, so these bands understate risk in those groups. Not valid in pregnancy, and not for anyone under 18.
Related Ocean Article: Obesity.
Further reading: GLP-1 Mimetics and Tirzepatide · Type 2 Diabetes & Insulin therapy (T2DM) · Prediabetes.
Part of the GPAtlas clinical calculators, each result explained, built by practising UK GPs.