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BMI Calculator

Calculate body mass index in metric or imperial units and see the healthy weight range for your height.

  1. Enter your numbers
  2. Results update as you type
  3. Copy the answer or share the link
Runs in your browser. Your data and files never leave your device.
Results are general estimates and are not medical advice. Talk to a health professional about your circumstances.

About the BMI Calculator

BMI (body mass index) relates weight to height and is used as a quick screening measure for adults. Enter your height and weight in metric or imperial units.

BMI Calculator formula

BMI = weight (kg) ÷ height (m)²

Example

72 kg and 1.75 m: 72 ÷ 1.75² = 23.5, in the healthy range.

Frequently asked questions

What is a healthy BMI?

For most adults, 18.5 to 24.9. Some populations use lower thresholds; your doctor can advise.

Is BMI accurate?

It’s a simple screen. Muscular people can have a high BMI without excess fat, and it doesn’t show where fat is carried.

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