What is body mass index (BMI)?

What is body mass index (BMI)?

What is body mass index (BMI)
What is body mass index (BMI)
Body Mass Index (BMI) is a measurement of a person’s weight with respect to his or her height. It is more of an indicator than a direct measurement of a person’s total body fat.

Body mass index (BMI) is a measure that uses your height and weight if your weight is healthy.

The BMI calculation divides an adult's weight in kilograms by their height in meters squared. For example, a BMI of 25 means 25 kg / m2.

BMI ranges
For most adults, an ideal BMI is in the 18.5 to 24.9 range.

For 2- to 18-year-olds and young people, BMI calculations take into account age and gender as well as height and weight.

If your BMI is:

Below 18.5 - You are in the underweight category
Between 18.5 and 24.9 - you are in a healthy weight range
Between 25 and 29.9 - you are in the overweight range
Between 30 and 39.9 - you are in the thick range
If you want to calculate your BMI, try our healthy weight calculator.

BMI Accuracy

BMI takes into account natural changes in body shape, which gives a healthy weight range for a particular height.

Along with measuring your BMI, health care professionals can take other factors into consideration if assessing your healthy weight.

Muscle is much more condensate than fat, so people with a lot of muscle, such as heavyweight boxers, weight trainers and athletes, can be a healthy weight, even if their BMI is classified as obese.

Your ethnic group may also affect your risk of certain health conditions. For example, adults of Asian descent may have a greater risk of health problems at BMI levels below 25.

If you are pregnant, you should not use BMI as a remedy. If you are concerned about your weight then consult your midwife or GP.

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