CDC Adult BMI Calculator

BMI Calculator

A person’s BMI (Body Mass Index) is a number derived from their weight and height. For most people, BMI is a fairly accurate predictor of body fatness. Furthermore, BMI is a low-cost, simple-to-use tool of screening for weight categories that may cause health problems.

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What is a BMI Calculator?

  • A BMI calculator is a device that measures your body mass index and can be used online or offline. The BMI, or body mass index, is a measurement of your body mass in relation to your height and weight.
  • Body mass refers to the total amount of fat in your body, as well as the amount of muscle and bone. It’s worked out by multiplying your weight by the square of your height. The BMI statistics indicate whether you are within a healthy weight range, underweight, or overweight.
  • Both high and low BMIs have been linked to a slew of health issues, particularly as people age. A high BMI, on the other hand, is not always a cause for concern in medical terms. It should be considered alongside other health indicators.

How to calculate BMI?

  • The calculating technique to determine your BMI or someone else’s BMI is straightforward. You can calculate it yourself with a handheld calculator or online utilizing body mass index calculators on websites or applications.
  • You may calculate the outcome by multiplying your weight in kilos by the square of your height in meters. Alternatively, you can just enter your height and weight into an app or website, and the BMI results will appear on your screen.
  • If your BMI is either above or below the normal range, you should see a doctor at least once every six months or once a year.
  • BMI in the range of 18.5 to 25 kg/m2 is considered normal. Underweight is defined as being under 15 pounds, underweight is defined as being 15 to 18 pounds, and overweight is defined as being 25 to 30 pounds. Obesity is defined as being between the ages of 30 and 40, and being significantly obese at the age of 40.

Assessing Your Weight and Health Risk

Three important measures are used in the assessment of weight and health risk:

  • Body mass index (BMI)
  • Waist circumference
  • Risk factors for diseases and conditions associated with obesity

Body Mass Index (BMI)

The BMI is a useful tool for determining whether or not someone is overweight or obese. It’s determined by your height and weight. BMI is a measurement of body fat and a reliable indicator of your risk of diseases associated with excess body fat. Heart disease, high blood pressure, type 2 diabetes, gallstones, respiratory issues, and some malignancies are all linked to a high BMI.

  • Despite the fact that BMI can be utilized by most men and women, it does have several limitations:
  • In athletes and those with a muscular physique, it may overstate body fat.
  • In older people and others who have lost muscular mass, it may underestimate body fat.
  • To calculate your body fat, use the BMI Calculator or the BMI Tables. The BMI (Body Mass Index) is a measurement of a person.

BMI For Men and Women

BMI CategoryBMI Range
(kg/m2)
UnderweightBelow 18.5
Normal18.5–24.9
Overweight25.0–29.9
Obesity30.0 and Above

Children’s BMI

The BMI calculator takes into account age, gender, height, and weight for children and young people aged 2 to 18.

Overweight children are regarded to be at higher risk for a range of health problems, as well as being more likely to be overweight as adults.

The BMI calculator determines whether a kid or adolescent is:

  • Underweight – on the 2nd centile or below
  • Healthy weight – between the 2nd and 91st centiles
  • Overweight – 91st centile or above
  • Very overweight – 98th centile or above

The BMI of a child is expressed as a “centile” to demonstrate how it relates to the BMI of children who participated in national surveys.

A girl in the 75th centile, for example, is heavier than 75 out of 100 other females her age.

Because it does not take their height into account, measuring waist size is not commonly suggested for youngsters.

Waist Circumference

Waist circumference measurement aids in the detection of potential health hazards associated with obesity and overweight. You’re more likely to develop heart disease and type 2 diabetes if the majority of your fat is concentrated around your waist rather than your hips. A waist size of more than 35 inches for women or more than 40 inches for men increases the risk. Place a tape measure around your center, slightly above your hipbones, to accurately measure your waist. Just as you exhale, take a measurement around your waist.

The table Risks of Obesity-Associated Diseases by BMI and Waist Circumference shows whether your BMI and waist circumference together enhance your chance of acquiring obesity-related diseases or disorders.

Risk Factors for Health Topics Associated With Obesity

The following conditions, in addition to being overweight or obese, will increase your risk of heart disease and other illnesses:

Factors at Risk:

  • Blood pressure that is too high (hypertension)
  • LDL cholesterol (the “bad” cholesterol) levels are high.
  • HDL cholesterol (the “good” cholesterol) levels are low.
  • Triglyceride levels are high.
  • Blood glucose levels are too high (sugar)
  • Premature heart disease in the family
  • Inactivity on the physical level
  • Smoking 

It is suggested that those who are obese (BMI higher than or equal to 30) or overweight (BMI 25 to 29.9) who have two or more risk factors reduce weight. Even a minor weight decrease (between 5% and 10% of your present weight) can significantly reduce your chance of acquiring obesity-related disorders. People who are overweight, don’t have a large waist circumference, and have fewer than two risk factors may need to stop gaining weight rather than lose it.

Consult your doctor to determine if you are at a higher risk and, if so, how much weight you should drop. Your BMI, waist measurement and other heart disease risk factors will be assessed by your doctor.

The good news is that even a minor weight decrease (between 5 and 10% of your present weight) will help reduce your risk of contracting certain diseases.

What Are Overweight and Obesity?

Overweight is having extra body weight from muscle, bone, fat, and/or water. Obesity is having a high Overweight refers to having too much muscle, bone, fat, and/or water on your body. Obesity is defined as having a large quantity of excess body fat. The body mass index (BMI) is a useful tool for determining whether or not someone is overweight or obese. The content on this website will offer you with knowledge about BMI (including its limitations) and how to achieve and maintain a healthy weight. If you are concerned about your BMI, speak with your doctor.

What Factors Contribute To a Healthy Weight?

A person’s weight can be affected by a variety of circumstances. Environment, family history and genetics, metabolism (the process by which your body converts food and oxygen into energy), and behavior or habits are all elements to consider.

Energy Balance

Maintaining a healthy weight requires a good sense of balance. The energy you acquire from food and drinks (energy IN) is balanced by the energy your body uses for things like breathing, digesting, and exercising (energy OUT):

  • Same amount of energy IN and OUT over time = no change in weight (energy balance)
  • More energy IN than OUT over time = weight gain
  • More energy OUT than IN over time = weight loss

Your energy IN and OUT do not need to balance perfectly every day to maintain a healthy weight. Maintaining a healthy weight is all about striking a balance over time.

If you do the following, you can achieve and keep a healthy weight:

  • Maintain a balanced diet, and if you are overweight or obese, cut 500 calories from your daily intake to lose weight.
  • Keep physically active
  • Reduce the amount of time you spend sitting down.

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