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BMI Calculator

Calculate adult body mass index.

Calculate adult body mass index. Free, no registration required.

Enter your details

Your result will appear here.

For adults only. BMI is a screening measure and should not be used alone to assess health.

How to use BMI Calculator

Enter the requested values and choose the appropriate units; results update automatically. Results are generated locally in your browser. No account is required.

Formula & assumptions

BMI = weight in kg / (height in metres)². Adult screening measure; no diagnosis is implied.