How Does BMI Work for Kids? Part 1

I got the following question from reader Lynn:

“I know that they use BMI for kids and I know that it’s different than what they do for adults, but I don’t understand how. Maybe you could write a newsletter about it?”

Indeed I can Lynn, thanks for the suggestion! This gets a bit complex, so it’s going to be a two-part series. In part 1 we’ll look at the basics.