BMI Calculator
Use the following form to calculate your body mass index:
Interpreting your BMI
Having calculated your body mass index, you may be wondering what it means. BMI measures your weight relative to your height and is an indicator of total body fat. The amount of body fat is, in turn, related to your risk of developing certain diseases. Using the chart below, find in which range your BMI falls and check the corresponding weight status.
|
BMI |
Weight Status |
|
below 18.5 |
Underweight |
|
18.5 – 24.9 |
Normal |
|
25.0 – 29.9 |
Overweight |
|
30.0 and above |
Obese |
Underweight
Being severely underweight (with a BMI far below 18.5) is a health risk because it may indicate that your body is not receiving adequate nutrition. If you are having any difficulty eating or digesting, experiencing disordered eating, you may want to consult your healthcare provider (1).
Normal
Your BMI indicates that you are at a healthy weight for your height. Practicing good nutrition and being physically active are key lifestyle practices to help prevent future weight gain. See our nutrition and exercise tips specific for college students and working professionals to continue on the right track.
Overweight and Obese
According to your BMI, you are carrying excess weight, which increases your risk for various diseases and health conditions including:
- Hypertension (high blood pressure)
- Type 2 diabetes
- Heart disease
- Stroke
- Gallbladder disease
- Osteoarthritis
- Sleep apnea and respiratory problems
- Certain cancers (breast and colon) (2)
Losing weight will help decrease this risk. Many people get discouraged because they think they need to lose 50 pounds, for example, in order to make a positive change, but even a slight weight loss (like 10% of your current weight) will significantly decrease your risk of developing these health conditions. For tips on eating and exercising to lose weight, visit our Energy Balance page (2).
Limitations of BMI
Although BMI is a reliable indicator of total body fat and predictor of disease risk, it does have some limitations. Since it’s solely based on body weight, the BMI measurement does not differentiate between fat and muscle. So, if you’re an athlete or you have a muscular build, your BMI value may indicate that you’re overweight or obese when in reality, you may have little body fat and a lot of muscle. On the contrary, for people who lost muscle mass (such as older persons or people with injuries), BMI may underestimate the amount of body fat (1).
Also, keep in mind that BMI is only one measurement used to determine health risk. Other factors to consider include waist circumference, family health history and lifestyle habits.
Now that you have assessed your current situation, see what steps you can take as college students or working professionals toward a healthy lifestyle of good nutrition and plentiful exercise.
Sources:
1. National Heart, Lung, Blood Institute. Aim for a Healthy Weight. Accessed May 2007.
2. Centers for Disease Control and Prevention. Body Mass Index. Accessed May 2007.
The above BMI chart and information applies to U.S. adults, not to children, youth and pregnant women. This information is not intended to take the place of advice from a healthcare professional. Check with your physician before starting any diet or exercise program. In addition, while all efforts have been made to ensure the information included in this material is correct, new research is released frequently and may invalidate certain pieces of data. 5/07