Posted Monday, February 16, 2009 --- 10:49 p.m.

This is a fun one about how tall your kids will be when they "grow up."

All of us parents have had the conversation, but it seems there are several different theories out there.

So we logged onto webmd.com and found a child's height calculator.

It's pretty simple - and keep in mind, it's geared mostly for kids over the age of four.

All you have to do is type in yours and your husband's heights, along with your child's gender, age, current height and weight.

We link you directly to this calculator on our web-channel, nbc15.com. Just head to the yellow box that says "news links" and have fun!

We should also mention that there are different medical conditions and backgrounds that can have a huge impact on this, so if you're worried about your kid's height be sure to call a doctor.