My predicted height doesn’t seem likely

Last updated on December 11, 2022


I am currently 5’7” and I am 15 years old my dad is 5’11” and my mom is 6’0” and my predicted height says that I will be 6’0’.

But the Tanner Stage Calculator says I’m at 4.1 and it says you only grow 1-3 inches during this stage. So is the calculator inaccurate and what do you think my predicted height should be?

Sorry if you get a lot of these height questions.


The height calculators guess at your stage of development or simply ignore it. This can throw them off if you are an early or late bloomer. But I don’t think this is what is off in your case.

Generally, a boy in a family grows to at least the average of his parents’ heights. Thus, I would expect you to at least reach 5’11.5″. There can be circumstances that might cause a boy not to reach his potential height, such as a severe disease or lack of nutrition, but these are rare cases. Being at stage 4.1 would be common for a 15-year-old boy but I would have expected you to be at least 5’9″ at this point.

More likely is that you got too high of an estimate on the Tanner Stage Calculator. But I don’t have enough information to figure out why this happened. I would need to know your growth over the last 5 years or so, and your answers to the questions on the calculator. Even then, I won’t be able to double-check your answers since I have no idea what you look like but I might be able to narrow down where the problem lies.


I did it different times on the Tanner Stage Calculator and got between 3.5 and 4.0.


3.5 would mean that you are still in the rapid growth phase and likely to reach the projected height.