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Excess Body Weight Calculator

Enter your current and ideal weight to see your excess body weight.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

Excess body weight is simply the gap between your current weight and your ideal weight — typically an ideal weight calculated from a formula like Hamwi or Devine — expressed both as an absolute amount and as a percentage above ideal.

This figure is the foundation of %EWL (percent excess weight loss), the standard metric bariatric surgeons and weight-management programs use to report and compare outcomes: a patient's progress after bariatric surgery is almost always reported as the percentage of their original excess weight that has been lost, rather than as raw pounds or kilograms lost, because %EWL normalizes for how much excess weight a person started with.

Enter your current and ideal weight, and this calculator returns your excess body weight in both absolute terms and as a percentage above ideal, giving you the baseline number that outcome tracking like %EWL is built from.

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