Calculate your Body Mass Index (BMI)

Overweight or Obese?

If you’ve come to this website, you’ve already taken the first major step toward regaining your health and your life.

Learn more

BMI Calculator

Calculate BMI

Overweight and obesity are not the same, rather they represent different points on the same path of weight, ranging from being underweight to being morbidly obese. Where you fall on this path is determined by Body Mass Index (BMI).

BMI is a measure of weight proportionate to height. Generally, BMI is considered an effective way to evaluate whether a person is overweight or obese, though there are exceptions to the rule. Some muscular people may have a BMI that puts them in the overweight range. However, these people are not considered overweight because muscle tissue weighs more than fat tissue.

According to the National Heart, Lung, and Blood Institute (NHLBI), a BMI from 18.5 to 24.9 is considered normal while a BMI of more than 25 is considered overweight. A person is considered obese if the BMI is above 30, and morbidly obese if the BMI is above 40.

BMI Ranges

  • Underweight = 18.5 or less
  • Normal weight = 18.5-24.9
  • Overweight = 25-29.9
  • Obesity = 30 or greater

Stanford Medicine Resources:

Footer Links: