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The web calculators give you today's number. The app keeps the history, handles more than one person, and checks children against the WHO growth reference.

100,000+ downloads. Free, and it works offline.

This is not medical advice. Body Numbers is a calculator. It does not diagnose, treat or monitor any condition, and no number it produces should replace a conversation with a doctor or a dietitian. If a result worries you, or if you are pregnant, unwell, or under eighteen, speak to a health professional.