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About this tool
Calculate BMI and related general wellness measures.
Understanding body mass index
BMI divides weight in kilograms by height in metres squared. It is a screening measure and does not directly measure body fat.
Worked example
At 70 kg and 1.70 m, BMI is approximately 24.2 kg/m².
Frequently asked question
Does BMI diagnose a health condition?
No. BMI is one screening metric; interpretation depends on clinical context, age and other factors.