What formula can estimate offsprings heights most forseeably?

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There isn't a 100% accurate formula, but we can generally predict height with the formula that you provided.

https://www.scientificamerican.com/article/how-much-of-human-height/

But obviously, height isn't all genetics. They say 60 to 80 percent of the difference in height between individuals is determined by genetic factors, whereas 20 to 40 percent can be attributed to environmental effects, mainly nutrition. There is also luck involved since there can be a mutation or injury. Heck, you can even get a benign tumor on the pituitary gland and become a giant. But most of the time, your formula will be accurate for most people.

A couple of anecdotal evidence doesn't disprove scientific data.

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Quote from: InStrydeMyFaith on December 02, 2020, 07:26:55 PMhttp://news.bbc.co.uk/2/hi/health/6154220.stm#:~:text=Fathers%20appear%20to%20determine%20the,taller%20dads%20make%20longer%20babies.

Of course it only says "suggests" but not off to a good start

Do you have a link to that study?

Just some more anecdotal evidence, my wife is about 30 cm shorter than her dad and 5 cm shorter than her mom. Why? Probably because her grandma is really short. So even grandparents can influence a child’s height.

And some more: https://www.celebheights.com/a/60.html

Again, I highly doubt that it’s only the father’s height that determines a child’s height.

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No
Your dad ht
Or your mother ht plus 10 to 16

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Quote from: NotSoBigBadBruin on December 03, 2020, 07:46:16 AMDo you have a link to that study?

Just some more anecdotal evidence, my wife is about 30 cm shorter than her dad and 5 cm shorter than her mom. Why? Probably because her grandma is really short. So even grandparents can influence a child’s height.

And some more: https://www.celebheights.com/a/60.html

Again, I highly doubt that it’s only the father’s height that determines a child’s height.

I don't know which study it is sorry. And this is the only article I have ever seen this being mentioned so it might not hold too much value.

But it is something worth bearing in mind. Although considering how complex height genetics are, perhaps indeed it would make sense to assume that both parents contribure their fair share. I am biologically illiterate though so take my word with a good grain of salt.