Figuring out how tall a boy should be isn’t an exact science. There are a couple of ways to make predictions, but there’s a big margin of error.
Mid-Parental Height Calculator
As you can guess from the title, this is a calculator that uses data from the parents. While the link may not always be obvious, there’s a correlation between the parent's and child’s height.
So, to calculate the average height of a boy, you add 5 inches (13 cm) to the mother's height. Then you add that number to the father’s height and divide the answer by two.
For example, a mother is 5’4” and the father is 6 feet. Adding 5 inches to the mother's height will give you 5’9”. Then you add 6 feet to that and you get 11’9”. You then divide this number by two to give you 5’8”.
This sounds complicated on paper, but it’s pretty simple. Still, if math isn’t your area of expertise, you can use this mid-parental height calculator.
However, the major issue with this method is the accuracy. Most of the time, this calculator won’t give you an exact match to the potential height. As a general rule, the boy’s height will be the number you calculated, plus or minus 3’5”.
This method requires more information, but the results are usually more accurate. To use growth charts, you have to be aware of a few facts. Human beings, both boys and girls, go through many stages of growth.
The first stage starts at birth and carries on for the first two years of the child's life. In this stage, there are a couple of size changes when it comes to height. Still, most of the changes in the period happen in mental development.
Then we move on to childhood and adolescence. This is where height changes start to present. As boys go through puberty, they’re going to change in many ways. One of the most visible ways is height.
So, when you’re trying to predict the height of a boy, it can be tricky to do it in the first stage. The answer you get will rarely be accurate. To get a more accurate reading, you have to wait until the adolescence stage.
Once the boy is going through adolescence, you can use growth charts. This chart factors in current height, weight, and age. Using these three factors, you can find the point your boy is on the chart.
Then, it’s just a game of following the curve. With this chart, you can get a preview of how boys’ height will change as they grow older.
Again, this method isn’t 100% accurate. Still, it has a much better margin of error.