Or maybe just I can’t do math. I showed Danny Ismond how to calculate his kid’s height when he’s an adult. This has been around since the 1970’s.
For a boy you take each parent’s height in cm/inches and add them together.
Then divide that number by 2.
Add 6.5 cm/2.5 ins to that number.
And voila, that result is the mid-parental height for boys. This number plus-or-minus 10 cm/4 ins is the range in which you can expect your son to fall. (So says the test)
Now that you know how to do it, have a listen to how I explained the test to Danny. Click here!