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BMI calculator

BMI

Metric or imperial. Instant category and healthy range — nothing leaves this tab.

Runs in your browser. Numbers stay on this device — nothing is uploaded to BrowserSpaces for processing.

Dual units

kg/cm or lb/ft+in.

Categories

Underweight through obesity bands.

Healthy range

Suggested weight span for BMI 18.5–24.9.

Use the calculator

BMI

23.5

Category

Normal

Healthy min (kg)

56.7

Healthy max (kg)

76.3

How it works

How BMI works here

BMI is a screening number, not a diagnosis. This tool uses the standard formula and WHO-style categories for adults.

Before you start

  • Athletes may fall outside typical bands.
  • Talk to a clinician for health decisions.

Three steps

  1. 1

    Pick units

    Metric or imperial.

  2. 2

    Enter height & weight

    Use realistic adult values.

  3. 3

    Read BMI & range

    Category plus healthy weight band.