#Teenage bmi calculator how to#
#Teenage bmi calculator full#

This is a quantity derived from BMI, and can be defined as using the following equation: Now we probably ought to explain a couple of terms that we have used in the text preceding and in the BMI calculator for kids itself, starting with BMI prime. This population, of course, includes only kids in their age range. The area it would have landed on represents the percentile he or she is in.įor most cases, a child has a healthy BMI if it is in the range of 5% to 95% of the populations BMI.

#Teenage bmi calculator how to#

To read this BMI chart for children properly, you must first find the BMI for the girl or the BMI for the boy that we are interested in (we have instruction below on how to do that using our calculator), and then locating it in the chart by looking at their age and BMI. This data is shown in the charts above and below, and they represent a compilation of all of the collected BMI data for kids in the USA, hence the name BMI chart for kids. To make this comparison, doctors use what are typically called a “ BMI chart for kids“, also referred to as a “ BMI chart for children“. It is for this very reason that the most common way to diagnose a healthy BMI for a child is by simply comparing the BMI for one boy with the BMI of all boys the same age as them (and, obviously, the same for girls). But there are also things specific to BMI for kids such as their current development phase and whether they are in a growth spurt, or if they have just had one the variations are bigger than for any group of adults. We have things like body type and proportions of lean body mass to body fat or even body water percentage that also affect adults (due to the difference in density of all those components). The reason for this comparison, apart from the shortcomings of BMI as a diagnostic tool, is the immense variation in features that affect the BMI for kids. We will explain later what percentiles are, but, for now, just know that it’s a tool to compare an individual with the rest of the population. In fact, when looking at BMI for boys or BMI for girls, doctors always use a percentile BMI chart for children so they know how healthy the results are. For kids, however, this problem is exacerbated. In some of our other BMI calculators, we mention the statistical nature of BMI and its inherent problem when using it as a diagnostic tool.

#Teenage bmi calculator full#

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