Free BMI calculator
BMI Calculator
Estimate your body mass index and understand the category in plain language. BMI is a starting point, not a verdict, so this page also explains what to do with the number.
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CategoryMethod, scope and sources
For adults aged 20 and older. BMI = weight in kilograms ÷ height in metres squared. Categories use the unrounded value. Supported inputs are 25–454 kg and 91.44–274.32 cm; these are calculator limits, not recommended body sizes. BMI is a screening measure, not a diagnosis, and is not interpreted the same way during pregnancy or for children and teens.
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