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How to calculate your body mass index (BMI)

If you are trying to figure out if you’re overweight, calculating your body mass index (BMI) is a good baseline to start with. BMI is a common screening tool that measures body fat, and excess body fat is a defining characteristic of being overweight or obese.

Though BMI is not a direct measure of body fat, research has shown that BMI does correlate to direct measures of body fat.

Calculating BMI

BMI measures body fat based on a person’s height and weight and is easy to calculate. To calculate your BMI, you’ll need to:

  1. Divide your weight in pounds by your height in inches squared.
  2. Multiply the result by 703.

See a simple calculation example here and then use our BMI calculator to quickly calculate your BMI.

The Body Mass Index Scale

Once you have calculated your BMI, refer to the categories below to determine whether you are overweight.

  • A BMI between 18.5 and 24.9 is considered within the normal, healthy range.
  • A BMI between 25 and 29.9 is considered overweight.
  • A BMI of 30 or more is considered obese.
  • A BMI of 40 or more is considered extremely obese.

Remember: This number should be used as a starting point because BMI is a screening tool, not a diagnostic tool. Since it doesn’t take other important information into account, such as body composition and lifestyle, it’s best to have a medical professional perform additional assessments to determine if your weight is unhealthy.

If your BMI is 30 or more, sign up for a free informational consultation today to determine if bariatric weight loss surgery can help you.

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