Body Mass Index (BMI) guide
Use this guide to practise the transparent arithmetic behind body mass index (bmi).
Formula
weight in kg ÷ height in metres²
Worked example
A fictional 80 kg at 1.8 m gives 24.7 kg/m² when the final arithmetic result is shown to 1 decimal place.
No category, diagnosis or health-risk interpretation is provided.
Educational medication-calculation arithmetic practice only. Use fictional or tutor-provided values. Do not enter patient information or use the result for an individual patient.