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BMI Calculator

A simple BMI calculator with metric and imperial modes, range validation, and an accessible category indicator.

Calculators Health Runs locally No sign-up

Body mass index

Between 50 cm and 272 cm.
Between 2 kg and 650 kg.
Body mass index — Enter your height and weight to see your BMI. Screening only — not a medical diagnosis.
Underweight Below 18.5
Normal 18.5 – 24.9
Overweight 25.0 – 29.9
Obesity 30.0 and above
Screening tool, not a diagnosis. BMI does not distinguish muscle from fat, and it is not interpreted the same way for children, older adults, or people who are pregnant. Talk to a healthcare professional about your results.

About BMI Calculator

Calculate body mass index in metric or imperial units with a clear category scale.

This tool runs locally in your browser. It does not upload your input, require an account, or store your data on a server. If a feature needs a network request, the interface asks before sending anything.

bmibody mass indexhealth calculatormetricimperial

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