Chestnut horse from the official Horses of Hoofprint Bay library art Hoofprint Bay Play on Steam

Foal potential calculator

Enter both parents’ strength and endurance potential, known inheritance traits, and how the parents are related. The tool prints a foal range and the chance of clearing 50, 75, or 100. Status: 1 source.

Foal beside a mare in the official Steam gallery

Calculator

Status: 1 source. Bands below are the only kinship cases this tool will run.

Results appear here. Without JavaScript, use the band table.

Published dice bands and breeding paths
CaseLowHighStatus
Unrelated-4111 source
Half-siblings / grandparent–grandchild-871 source
Full siblings / parent–child-1231 source
PathSuccessFeeStatus
Town broker100%100 plus potential bonuses1 source
Own stallion100%01 source
Fresh semen85%101 source
Frozen semen70%201 source

Rule source: Walkthrough Forge breeding guide

Inheritable traits and incompatible pairs

Use this reference alongside the potential estimate. The status column distinguishes the trait list from the precise effects reported by one guide.

14 rows
traits: 14 entries
Easy KeeperYesHard KeeperNames: 2 sources; exact effects: 1 guide
Hard KeeperYesEasy KeeperNames: 2 sources; exact effects: 1 guide
SnackyNoNames: 2 sources; exact effects: 1 guide
CuddlyNoNames: 2 sources; exact effects: 1 guide
Neat FreakNoMud LoverNames: 2 sources; exact effects: 1 guide
Mud LoverNoNeat FreakNames: 2 sources; exact effects: 1 guide
Sure FootedYesInjury ProneNames: 2 sources; exact effects: 1 guide
Injury ProneYesSure FootedNames: 2 sources; exact effects: 1 guide
Good MomNoNames: 2 sources; exact effects: 1 guide
Good InheritanceNoBad InheritanceNames: 2 sources; exact effects: 1 guide
Bad InheritanceNoGood InheritanceNames: 2 sources; exact effects: 1 guide
RebelliousYesEnergetic; ChillNames: 2 sources; exact effects: 1 guide
EnergeticYesRebellious; ChillNames: 2 sources; exact effects: 1 guide
ChillYesRebellious; EnergeticNames: 2 sources; exact effects: 1 guide

For each stat, first truncate the parents’ average to a whole number, then add one of 16 equally likely integers. The linked guide’s calculator uses that truncation rule. Unrelated parents roll from −4 to +11. Half siblings or a grandparent pairing roll from −8 to +7. Full siblings or a parent-and-offspring pairing roll from −12 to +3. Each Good Inheritance adds 2. Each Bad Inheritance subtracts 2. Strength is then clamped to 25–100 and endurance to 20–100. The two stats roll separately, so a double target is the product of the two chances.

A vet test called Test Potential costs 150 coins if you need the real parent numbers. The in-game foal simulator’s top value sits one above the true cap, and it hides inheritance traits that still affect the roll. This page does not invent a kinship penalty outside the three bands above. The breeding page explains fees: broker, own stallion, fresh semen, and frozen semen.

Related guides

Questions

Why might my foal miss this range?

Hidden inheritance traits still affect the result. This estimate only includes the parent values and traits entered above.

Sources