What BMI means
BMI is weight in kilograms divided by height in meters squared. It is a quick screening number, not a diagnosis. Athletes, children, older adults and pregnant people may need more context than BMI alone.
BMI calculator
Calculate body mass index from height and weight.
Result
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Frequently asked questions
What is a normal BMI?
The common adult range is 18.5 to 24.9.
Is BMI a medical diagnosis?
No. It is a screening tool and should not replace professional advice.
Are my height and weight saved?
No. All calculations happen locally in your browser.