While it’s actually very easy math, just addition and multiplication, the definition topic is full of mathy jargon and it can be somewhat challenging to calc expected turncount manually. So in the zip is some stuff to make that easier. It should be "trivial" to implement an excel doc or online calculator or in some other program along the same lines, but I’ll leave that to someone else. >_>

There’s also HM bonus stats in gbaemblem as well the prob of getting stats and meeting a benchmark assuming HM bonus and natural growth. I think it’s pretty functional, but I would generally recommend just using a binomial for stats if not dealing with random HM bonuses. Examples below:

Probability of at least some number of successes, in some number of trials, at some probability. Can apply to growths in some number of levels or chance of death in a certain number of attacks or any other situation with just success or failure outcomes. Use a calculator https://stattrek.com/online-calculator/binomial.aspx , last row P(X > x) or in Google Docs or most other spreedsheets
=BINOM.DIST(levels-procs,levels,1-growth,TRUE)
or
=BINOM.DIST(attacks-hits,attacks,1-hitrate,TRUE)

The number of successes, in some number of trials, at some threshold of reliability. 90%=0.9 is a typical baseline. In Google Docs or most other spreedsheets
=BINOM.INV(levels,growth, (1-0.9) for 90% reliability)

The binomials are literally less work than a lot of what I know people used to calc manually so eh. If setup properly, you can just copypaste from SF. The other stuff is literally trivial if you read the readme, but I understand issues wrt the accessibility (but note Octave is freeware, if that wasn’t clear).