Online Tool

BMI Calculator

Calculate adult body mass index in metric or US units and show the WHO category.

Everything runs in your browser. Files and text are not uploaded or saved.

Measurements

Categories follow the WHO adult ranges: under 18.5, 18.5–24.9, 25–29.9, and 30 or more.

BMI 22.9
Healthy weight

How to Use

  1. Choose metric or US units.
  2. Enter weight and height.
  3. Read the BMI and category.
  4. Copy the result or reset.

FAQ

Which categories are used?

WHO adult ranges: under 18.5, 18.5–24.9, 25–29.9, and 30 or more.

Can the units be mixed?

No. Metric uses kilograms and centimeters. US uses pounds and inches.

Is this medical advice?

No. It is an arithmetic result for adults.