Body mass index (BMI) calculator

Change the height and mass to see the BMI and where it sits on the chart.

Works in metric or imperial units.

Learn body mass index properly

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Questions students ask

What are the limits of BMI?

It does not separate muscle from fat, so athletes can score as overweight, and it ignores age, sex and where fat is stored.

What formula does it use?

BMI = mass (kg) ÷ height (m)².

Free notes on body mass index

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