BMI calculator

Calculate body mass index from height and weight, with the category ranges and an honest note on what BMI does and does not tell you.

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How it works

Enter height and weight in metric or imperial to get your BMI and the standard category. BMI is a population screening measure, not a diagnosis — it ignores muscle mass, body composition and distribution, so treat it as one weak signal among several.

Your data stays on your device.

Palarid runs entirely in your browser. There is no account, no tracking and no server copy of anything you enter. You can export everything as JSON at any time.

Common questions

What are the BMI categories?

Under 18.5 underweight, 18.5–24.9 healthy, 25–29.9 overweight, 30+ obese. Ranges differ for some ethnic groups.

Is BMI reliable for athletes?

No. Muscle is dense, so muscular people are frequently misclassified as overweight.

Should I act on my BMI alone?

No. Discuss health concerns with a clinician who can consider the full picture.

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