Child height chart | Sheknows.com Basically add the two parents heights (in inches) and add 5 inches for boy and minus 5 inches for a girl and then divide by 2. Apparently it has an error rate of 10%. ****Environmental factors, of course, can change growth.
To go with the best nursery ever, the best growth chart ever. Multi-fandom, so you can measure your child's geek/cool level as you measure their height. I feel the need to write a song called "I'm taller than a Tribble."