Tool
BMI Calculator
Calculate body mass index from height and weight. BMI is an educational ratio. It does not measure body fat or diagnose health.
How this estimate is made
BMI = kg รท (height in metres squared). Categories used in clinics are screening tools, not a Fitkyn diagnosis.
See the medical disclaimer. Track a plan in the Fitkyn app. Browse all tools or health guides.
Frequently asked questions
Is this medical advice?
No. Results are population estimates. Discuss medical conditions, pregnancy, eating disorders, or medications with a qualified healthcare professional.
Why might my number differ from another site?
Equations, activity factors, and rounding differ. Treat every calculator as a sketch.
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