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Adult BMI Calculator

Calculate adult body mass index using metric or imperial measurements and see the screening category.

Choose the option that matches your situation.

Enter height (cm / inches); see assumptions below for the model limits.

Enter weight (kg / pounds); see assumptions below for the model limits.

Your results

BMI
24.22
Adult screening category
Healthy weight

Calculations run in your browser. Results are estimates where described below.

How the calculation works

BMI = weight in kilograms ÷ (height in metres)².

Worked example

70 kg and 170 cm gives BMI 24.22, in the adult healthy-weight screening range.

Assumptions and limits

For adults only. BMI does not measure body fat or diagnose health. Pregnancy, muscle mass and other factors can make the category less useful.

Reference sources

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