BMI Calculator

Body mass index from your height and weight — with the healthy-range check.

Your numbers

Your BMI

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WHO adult ranges: under 18.5 underweight · 18.5–24.9 healthy · 25–29.9 overweight · 30+ obese.

Worth knowing

BMI is a population-level screening number — it can’t tell muscle from fat. If you carry a lot of muscle, your BMI will read high even at a lean body-fat level. Treat it as one data point, not a verdict.

Formula: weight (kg) ÷ height (m)².

General fitness estimates for healthy adults — not medical advice.

Get real-time coaching, not just numbers

FitFormBuddy turns your camera into a form coach — reps counted, technique corrected as you train.