WW BMI Chart

What is Body Mass Index (BMI)?

The Body Mass Index (BMI) is a straightforward indicator of weight-related health risk. It is one of the factors considered by your health care provider when determining your health risk in relation to your weight. It is a signal to your doctor to conduct a thorough examination and have a more in-depth discussion with you about your health. Adults aged 20 and older are included in the sample. BMI-for-age, or BMI percentile, is a similar measure for children and adolescents. This metric takes into account the child’s gender, age, and weight.

As recognized by international health organizations such as the US Centers for Disease and Protection and the World Health Organization, BMI uses the relationship between weight and height to approximate the body fat percentage.

A higher body fat percentage has been linked to an increased risk of developing certain diseases, including heart disease, hypertension, type 2 diabetes, difficulty breathing, certain cancers, and death.


WW BMI Chart:

WW BMI chart
WW BMI Chart

How is BMI calculated?

It’s as easy as entering your height and weight into an online BMI calculator for women and men, similar to the ones given by the National Heart, Lung, and Blood Institute in the United States.

BMI formula: weight (in kilograms) divided by height squared (in meters), expressed as kg/m2.

  • Formula: Weight (kg)/[height (m)]2
  • Example: weight = 60 kg and height = 1.50 m
  • Calculation: 60/ (1.50)2= 60/2.25=26.67

In the English System, it is calculated as follows: your weight (in pounds) divided by height squared (in inches) multiplied by 703.

  • Formula: [Weight (lb)/height (in)]2 x 703
  • Example: weight = 180 lb and height = 68 in
  • Calculation: [180/ (68)2] x 703= [180/4624] x 703= 27.37

Following are the weight categories used to calculate BMI:

BMI (kg/m)2Weight Range
< 18.5Underweight
18.5-24.9Healthy Weight
30.0 or higherObese

Overweight and obese refer to weight ranges that are higher than what is generally considered healthy for a particular height and are used to indicate a higher risk of disorders including type 2 diabetes and obstructive sleep apnea.  Underweight refers to a weight range that is lower than what is generally considered healthy for a particular height. It can signal underlying medical concerns or an eating disorder, as well as an increased risk of illnesses like osteoporosis.

What can I do to lose weight?

Losing 10% of your body weight is a decent first target to set for yourself. Even if that isn’t enough to get you into a healthy weight range, it’s a good place to start if you’re overweight, with evidence indicating that it is enough to provide health benefits such as lowering risk factors for type 2 diabetes and heart disease. The WW program encourages members to set realistic weight-loss goals and equips them with the tools they need to succeed.

Is a woman’s BMI more important than a man’s?

Both men and women have the same BMI values, and both have the same chances of acquiring weight-related illnesses.

A higher BMI has been linked to an increased risk of a variety of ailments, including heart disease, type 2 diabetes, osteoarthritis, and some types of cancer, including breast cancer, according to research.

Is the BMI completely accurate?

It isn’t always correct for everyone. Because it doesn’t distinguish between fat and muscle, people with a lot of muscle mass will typically have a high BMI, even if their body fat is within normal limits. Furthermore, a healthy BMI does not always imply excellent health. In reality, when additional test findings, such as blood pressure, blood glucose, and cholesterol, are taken into account, one out of every three people with a good BMI is found to be somewhat unhealthy.

One argument is that BMI does not indicate where body fat is stored, so you can have a good BMI but carry too much fat around your waist, which offers a greater health risk than weight carried on your hips and thighs. People who carry weight around their middle but have healthy BMIs had the highest risk of mortality from any cause, according to a 2017 study, compared to people with higher BMIs who carry the weight elsewhere.

“If I had to pick between keeping my BMI in the ‘normal’ range and keeping my waist-to-hip ratio in the ‘normal’ range, I would prefer the latter,” says Associate Professor Emmanuel Stamatakis of the University of Sydney, who co-led the study. “A high waist-to-hip ratio most certainly suggests a lot of abdominal fat, which has been linked to a lot of health problems.”

Is it necessary for me to calculate my BMI?

Yes. While BMI may not be a perfect measure of medical risk for every individual, it is nevertheless extremely useful as feedback for you.

While knowing and calculating your BMI is a good idea, no piece of information about your weight or health should be considered in isolation, so it’s critical to assess your BMI in the context of other data and measurements.

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