BMI Calculator

Calculate body mass index from your height and weight in centimeters and kilograms, or feet, inches and pounds. Results use the standard adult categories and are for general information only.

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How to use the bmi calculator

  1. Choose metric or imperial units.
  2. Enter your height and weight.
  3. See your BMI value, category and position on the range bar.

Example: a person 170 cm tall weighing 70 kg has a BMI of 70 ÷ (1.70 × 1.70) ≈ 24.2, which falls in the normal weight range (18.5–24.9).

Frequently asked questions

What are the BMI categories for adults?

Below 18.5 is underweight, 18.5 to 24.9 is normal weight, 25 to 29.9 is overweight, and 30 or above is obesity.

Is BMI accurate?

BMI is only a screening measure. It does not measure body fat or muscle, and it is not meant for children or pregnancy. Ask a healthcare professional for medical advice.

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