How do I use the BMI Calculator?

BMI = weight (kg) / height² (m²) — or use unit=imperial for inches/pounds The WHO cutoffs aren't perfect — athletes often classify as 'overweight' Consider waist-to-height ratio as a complementary measure

Is the BMI Calculator free and private?

Yes — it runs in your browser, requires no signup for basic use, and your data never leaves your device. BMI was invented by Belgian mathematician Adolphe Quetelet in the 1830s — it was never meant to be a medical metric, just a population statistic.

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BMI Calculator

Body mass index with WHO categories — metric or imperial

1 credit

height=… weight=… unit=metric|imperial

BMI + Category

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