How is BMI calculated?

BMI is weight in kilograms divided by height in metres squared. Imperial inputs are converted to those units before calculation.

Which BMI categories are shown?

The page uses the common adult cutoffs: below 18.5, 18.5–24.9, 25–29.9, and 30 or above.

No. BMI is a screening ratio and does not account for age-specific growth, pregnancy, muscle mass, or body composition. It is not a diagnosis.

LocalFree

Calculate your Body Mass Index (BMI) and see which WHO category you fall into. Supports metric and imperial units.

MetricImperial

Input

Height (cm)

Weight (kg)

Your BMI

24.2

Normal weight

Underweight< 18.5

Normal18.5 - 24.9

Overweight25 - 29.9

Obese≥ 30

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How is BMI calculated?: BMI is weight in kilograms divided by height in metres squared. Imperial inputs are converted to those units before calculation.
Which BMI categories are shown?: The page uses the common adult cutoffs: below 18.5, 18.5–24.9, 25–29.9, and 30 or above.
Is BMI a medical diagnosis?: No. BMI is a screening ratio and does not account for age-specific growth, pregnancy, muscle mass, or body composition. It is not a diagnosis.