Ride A Pet Hatch Odds Calculator - 50/90/99% Confidence
Free Ride A Pet hatch odds calculator: enter 1-in-N odds and Luck multiplier to get the exact egg count for 50%, 90%, and 99% confidence of hatching any pet.
How Many Eggs Until Your Target Pet?
Hatching is a lottery with known odds. This calculator converts “1 in N” odds plus your Luck multiplier into the exact number of eggs you need for a 50%, 90%, or 99% chance of hatching your target.
The Math Behind It
The probability of at least one success in k eggs is:
P = 1 - (1 - Luck/N)^k
Solving for k at a confidence level you pick (50%, 90%, 99%) gives the egg counts below. The expected value — the average over infinite runs — is simply N / Luck.
Try It
Pick your odds and Luck above, then click Calculate — or simply change any option and the results update instantly below.
Reading the Results
- Expected eggs is the long-run average — but luck means you can go far past it
- 90% confidence is the practical planning number: nineteen times out of twenty you will have your pet by then
- 99% is for the paranoid — or for planning multi-day grinds like the 1-in-1Qi Kitsune
Popular Targets
| Pet | Odds | Luck | 90% Eggs |
|---|---|---|---|
| Horse | 1 in 500K | x1 | ~1.15M |
| Fox | 1 in 21M | x10 | ~4.8M |
| Cheetah | 1 in 7B | x10 | ~1.6B |
| Unicorn | 1 in 1T | x100 | ~23B |
Frequently Asked Questions
Does Luck multiply the odds or add to them? Luck divides the denominator — “1 in N” becomes “1 in N/Luck”.
Is 99% worth planning around? Only for multi-day targets. For anything hatching within a session, 90% is the realistic plan.
Where do I check my Luck? Luck comes from eggs and temporary Luck Multipliers — see the cash multiplier guide for what resets at rebirth.
Related Tools and Guides
- Mutation Speed Calculator — What to do after you hatch it
- Pet Database — Every pet with odds
- Egg Odds Chart — All 30 eggs ranked
- Rebirth Timer — Plan the grind to your next unlock
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