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A frustrated-looking man with obesity is held back by resistance bandsA frustrated-looking man with obesity is held back by resistance bands

What is Obesity?

Obesity is a chronic disease.1

Obesity can stem from a complex combination of factors, including genetics, your environment, diet, lifestyle, and social and cultural circumstances. Just like many other chronic diseases, obesity has a significant impact on the person living with it and on the people around them.2 Living with obesity can lead to physical limitations, can impact mental health, and is linked to over 200 health complications.3,4

When you understand more about obesity as disease, you and your healthcare provider can start to address the underlying causes of obesity and help you to have the suitable treatment for you.1,5

Are you living with obesity?

Body Mass Index (BMI) and obesity

There are different considerations when defining obesity—it is more complicated than just a number on a scale.6 Obesity is a chronic disease and while BMI can be used to categorize obesity, your doctor may consider additional factors.7 Some of these factors include the measurement of waist-to-height ratio and the effect that excess weight has on your health or quality of life whether that be medically, functionally, or psychologically.8 BMI is calculated by comparing your weight to your height and can be an initial indicator on whether you should speak with your doctor.

Enter your height and weight to calculate your BMI.

Use the chart below to see the BMI categories for those aged 20 and older and their definitions.6 It’s important to note that the BMI categories can differ depending on a person’s ethnicity.7 Remember, your BMI is just one indicator for obesity—it is always best to talk with your doctor about it.

BMI CALCULATOR

Height (in m/cm)

Weight (in kg)


Fill in your height and weight in order to receive your result.

If you are concerned about your BMI results, consult your doctor.

BMI ranges8

≤18.5

If your BMI is less than 18.5kg/m2, it falls within the underweight range.

18.5 - 24.9

If your BMI is 18.5 to 24.9kg/m2, it falls within the healthy weight range.

25.0 - 29.9

If your BMI is 25.0 to 29.9kg/m2, it falls within the overweight range.

≥30.0

If your BMI is 30.0kg/m2 or higher, it falls within the obesity range.

BMI ranges6

≤18.5

If your BMI is less than 18.5kg/m2, it falls within the underweight range.

18.5 - 24.9

If your BMI is 18.5 to 24.9kg/m2, it falls within the healthy weight range.

25.0 - 29.9

If your BMI is 25.0 to 29.9kg/m2, it falls within the overweight range.

≥30.0

If your BMI is 30.0kg/m2 or higher, it falls within the obesity range.

  1. Greenway FL. Physiological adaptations to weight loss and factors favouring weight regain. Int J Obes (Lond).2015;39(8):1188–1196. doi:10.1038/ijo.2015.59
  2. Eunice Kennedy Shriver National Institute of Child Health and Human Development. What causes obesity & overweight? Reviewed July 28, 2021. Accessed August 5, 2024.https://www.nichd.nih.gov/health/topics/obesity/conditioninfo/cause
  3. Horn SB, Almandoz JP, Look M. What is clinically relevant weight loss for your patients and how can it be achieved? A narrative review. Postgrad Med. 2022;134(4):359-375. doi:10.1080/00325481.2022.2051366
  4. Albano G, Rowlands K, Baciadonna L, Coco GL, Cardi V. Interpersonal difficulties in obesity: a systematic review and meta-analysis to inform a rejection sensitivity-based model. Neurosci Biobehav Rev. 2019;107:846-861.doi: 10.1016/j.neubiorev.2019.09.039
  5. MacLean PS, Bergouignan A, Cornier MA, Jackman MR. Biology's response to dieting: the impetus for weight regain. Am J Physiol Regul Integr Comp Physiol. 2011;301(3):R581–R600. doi:10.1152/ajpregu.00755.2010
  6. National Heart, Lung, and Blood Institute. Overweight and obesity: symptoms and diagnosis. Updated March 24, 2022. Accessed August 5, 2024. https://www.nhlbi.nih.gov/health/overweight-and-obesity/symptoms
  7. Busetto L, Dicker D, Frühbeck G, et al. A new framework for the diagnosis, staging and management of obesity in adults. Nat Med. Published online July 5, 2024. doi:10.1038/s41591-024-03095-3
  8. Stephenson J, Smith CM, Kearns B, Haywood A, Bissell P. The association between obesity and quality of life: a retrospective analysis of a large-scale population-based cohort study. BMC Public Health. 2021;21(1):1990. doi:10.1186/s12889-021-12009-8