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Adult Body Mass Index (BMI) Calculator


Are you overweight? What's your body mass index (BMI)? Find out right now for free!


The body mass index (BMI), is a measure for human body shape based on an individual's mass and height. The BMI is used in a wide variety of contexts as a simple method to assess how much an individual's body weight departs from what is normal or desirable for a person of his or her height. It is a measurement of the relative percentages of fat and muscle mass in the human body, in which mass in kilograms is divided by height in meters squared and the result used as an index of obesity. A BMI of 18.5 to 25 may indicate optimal weight, a BMI lower than 18.5 suggests the person is underweight, a number above 25 may indicate the person is overweight, a number above 30 suggests the person is obese.

A frequent use of the BMI is to assess how much an individual's body weight departs from what is normal or desirable for a person of his or her height. The weight excess or deficiency may, in part, be accounted for by body fat (adipose tissue), although other factors such as muscularity and ethnicity also affect BMI significantly. It also fails to account for varying proportions of body frame size, fat, bone, cartilage, water weight, etc. Other measures of obesity that we have as calculators are:

Use our calculator to work our your body mass index (BMI).

Note: This calculator is only suitable for adult men and women, as child BMI is treated differently.

 

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Health Consequences Of Overweight And Obesity


Although the body mass index has caused lots of controversy as to how accurate it is (see factors mentioned above for examples), many physicians, nurses and other professionals use it as a guideline to decide whether someone is overweight, underweight, or considered to be within the normal range. Despite the controversy, it still can give an individual an idea of where they lie and may just make them wake up to the fact that there is something wrong with their weight that needs correcting.

Overweight and obese individuals should be aware of increased risk for many diseases and health conditions, including the following:

  • Hypertension
  • Dyslipidemia (for example, high LDL cholesterol, low HDL cholesterol, or high levels of triglycerides)
  • Type 2 diabetes
  • Coronary heart disease
  • Stroke
  • Gallbladder disease
  • Osteoarthritis
  • Sleep apnea and respiratory problems
  • Some cancers (endometrial, breast, and colon)

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