Foal Stat Calculator

I've finally managed to work out the breeding formula, so as promised here is a calculator that can accurately predict the stats of a foal when given the parents' base stats, stats at the time of breeding, and discipline. To use it, click the link below, enter the details of the sire and dam, then click 'Calculate'.

Foal Stat Calculator

I've thoroughly tested it and I'm confident it works for every type of breeding, but if you see any discrepancies please let me know by posting here. Likewise, if you see any other issues or bugs, have a question, or would like to suggest a feature for a future version, please post it here and I'll help you out.


Frequently Asked Questions

Where do I find the base stats?
These are located at the very bottom of a horse's page, next to the private notes. Unfortunately only the owner can see them, so if you're using an outside stud or brood you'll have to message the owner to get these.

What's the breeding formula?
Details of the calculations used can be found here, including some tips for how to get the best stats in your foals.

What other foal calculators exist?
I have also made a foal genotype predictor. A foal conformation calculator does not yet exist.

Just some interesting stats about the calculator...
- This was made using Javascript and HTML.
- It consists of over 300 lines of code.
- Nearly 100 breedings were examined in order to determine the breeding formula. (There was a lot of trial and error!)

Last edited on 2017-05-01 at 23:54:34 by UlyssesBlue

I tried using this, and got a bunch of N/A for the resultant foal on both sides of the stats. Is this because I could not put in the sire's base stats because he wasn't mine?

EDIT: Reread the thread... I see I have to message the owner, okay

Last edited on 2017-05-16 at 14:20:22 by Smokey Thoroughbreds Unit

Out of curiosity, why are both the base stats and stats when bred requested in this calculation? Do the base stats make that much of a difference?

@Smokey
Yes. You need to put in all numbers otherwise it can't perform the calculation. If you don't have the base stats you can either message the owner to get them or take an educated guess to get an approximate prediction. Foundations have approximately 20 stats in each of their base stats, but all other horses can be literally anything, so guessing won't be reliable for them.

@MythicalSis
Base stats are a significant contributor to the stats of the foal. You can see the exact breeding formula here, but as an example, consider these breedings:

Let's say you have a mare that you intend to breed, who has the following stats:
Mare base stats: 20, 20, 20, 20, 20
Mare stats now: 500, 20, 20, 20, 500

You've found two suitable studs, both of which have the same stats:
Stallion stats now: 500, 20, 20, 20, 500

However they have very different base stats:
Base stats of StudA: 20, 20, 20, 20, 20
Base stats of StudB: 300, 20, 20, 20, 300

A breeding between your mare and each of these studs would produce foals with the following stats:
Your Mare x StudA = FoalA: 252 20 20 20 252 (total 564)
Your Mare x StudB = FoalB: 338 20 20 20 338 (total 736)

So despite the studs having the same stats, the one with the higher base stats is able to produce a foal with much higher stats that the other (172 stats difference in this example).

Update
Added some more error testing functionality so if you forget to add something in, rather than just failing to calculate it it'll instead tell you what you need to do to fix it.

This is awesome. I do have one question. What is the difference between base stat and birth stats?

Birth stats are generally much higher than base stats, except in foundations, where they are the same. Base stats are what contribute to breeding, along with a horse's current stats. Birth stats don't really do anything. It's just something interesting to note if you keep track of a horse's progress.

Am I the only one for whom the calculator isn't showing up anymore? I tried it both on my computer and phone, with wifi and mobile data, but it doesn't seem to work. I can reach the site and all the text shows up but no calculator. I just used it less than a week ago and everything was fine then.

@Akvelins it isn't working for me either, and I used it last week as well. 

I´ve just tried and it worked for me. I´m using a computer, with Mozilla Firefox.

Oh! I totally figured it out. @Akvelins I'll message you

I'm having the same problem - I used just a few days ago and now the calculator isn't showing up. @The Black Cat if you know what's wrong and how to fix it, do you mind writing it out here in the thread for everyone else who has this problem? (: