BMI

BMI

BMI Calculator

Fast body mass index (BMI) with interpretation. For adults (18 years and older).

Medical Wizardry • Calculators Last updated: 05 Jan 2026

Inputs

centimeters
kilograms

Tip: the result updates automatically while typing. Use realistic values for better interpretation.

Result

—
Body mass index
(kilograms per square metre)
Enter height and weight

BMI is a screening tool. For muscular individuals, pregnancy, oedema, and certain illnesses, BMI can mislead. Use clinical context.

Classification (WHO, adults): Underweight < 18.5, Normal 18.5 to 24.9, Overweight 25.0 to 29.9, Obesity ≥ 30.0.
Disclaimer: For education. Not a substitute for clinical judgement. In emergencies, follow local protocols.
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