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Roblox Pet Simulator X Hatch Probability Calculator

Calculate your odds of hatching a Huge Pet in Pet Simulator X. Factor in Luck passes and AFK time.

Pet Simulator X Hatch Probability

Will you hatch the Huge? Calculate your real odds.

Hatching Setup

If odds are 1 in 5,000, type "5000".

Luck Calculator

Input your setup to see if you are lucky or wasting time.

Understanding the Inputs

Base Odds: The raw chance to hatch the pet (e.g., 1 in 10,000,000). You can find this on the wiki.

Hatches Per Minute: Triple Hatch opens 3 eggs every ~3 seconds. This equals 60-80 eggs per minute.

Formula Used

Binomial Probability:

Chance = 1 - (1 - Odds)^Hatches

This formula accurately calculates probability over multiple attempts.

Pet Simulator X Hatching Guide: Odds, Mythicals, & Huges

Is it luck, or is it just math? Here is the truth about hatching Huges.

The "Gambler's Fallacy" in PSX

Many players think: "I opened 9,999 eggs and didn't get a huge. The next one MUST be it!"

This is false. In Pet Simulator X, every single egg hatch is an independent event (unless there is a pity system, which is rare). If the odds are 1 in 1,000,000, your 1,000,000th egg still has exactly a 1 in 1,000,000 chance.

This calculator uses the binomial probability formula to tell you your cummulative chance of seeing at least one success over a long AFK session.

Does Luck Work on Huge Pets?

Generally No. The developers of PSX (BIG Games) have historically separated "Luck" stats into two buckets:

  • Egg Luck: Affected by "Lucky" and "Super Lucky" passes. Increases chance of Legendaries, Mythicals, and Secrets.
  • Huge Luck: Usually Fixed. Only affected by specific "Huge Hunter" gamepasses or server-wide Huge Luck events. Buying normal luck does NOT help you hatch a Huge Hell Rock.

The Power of Volume (Speed)

Since you cannot easily change the Odds (p), the only variable you control is Volume (n).

Octuple Hatch: Hatching 8 eggs at once serves as an 8x multiplier to your effective Huge rate. It is arguably the most powerful gamepass for Huge Hunters, far better than Lucky.

Auto-Hatch: Reducing the delay between hatches by even 0.5 seconds adds up to thousands of extra attempts over a 24-hour AFK session.

Summary

Hatching a Huge Pet is a marathon, not a sprint. By understanding that odds are independent and focusing on maximizing your hatch speed (Volume), you significantly increase your chances of success over time.

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FAQs

Does 'Ultra Lucky' work on Huge Pets?

Generally, no. In Pet Simulator X, most Luck Gamepasses explicitly state they affect 'Base Egg Odds' (Rares, Epics, Legendaries, Mythicals). Huge Pets usually have a fixed server-side roll that is unaffected by your personal luck passes, unless an event specifically says '2x Huge Chance'.

What is 'Pity System'?

Some eggs have a Pity System (e.g., hatch 5,000 eggs to guarantee a Huge). However, this is rare and usually only applies to specific Event Eggs or Exclusive Eggs (Robux eggs). Standard coins eggs do not have a hard pity for Huges.

Is Triple Hatch worth it?

Yes. Triple Hatch (or Octuple Hatch) literally multiplies your speed by 3x or 8x. Since Huge Pets are a numbers game (quantity of hatches), hatching 8 eggs at once gives you 8x better chances per minute than hatching 1.

How accurate are the '1 in X' odds?

The developers rarely publish exact numbers. The community estimates odds based on millions of hatches. A Base Huge is typically estimated at 1 in 10,000,000 or worse depending on the egg.

What is 'Server Luck'?

Server Luck (often from Boosts) applies a multiplier to everyone in the server. This often DOES STACK with personal luck and event luck.

What is the 'Shiny' chance?

Shiny chance is separate from rarity. It's roughly 1 in 500 to 1 in 1000 for any pet to spawn as Shiny. The 'Shiny Hunter' gamepass significantly improves this.

Can I hatch a Titanic F2P?

Extremely unlikely. Titanics are almost exclusively from Exclusive Eggs (Robux) or Merchandise Codes. Very rarely, an event might offer a hatchable Titanic with odds like 1 in a Billion.

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Roblox Pet Simulator X Hatch Probability Calculator

Calculate your odds of hatching a Huge Pet in Pet Simulator X. Factor in Luck passes and AFK time.

How to use Roblox Pet Simulator X Hatch Probability Calculator

Step-by-step guide to using the Roblox Pet Simulator X Hatch Probability Calculator:

  1. Enter your values. Input the required values in the calculator form
  2. Calculate. The calculator will automatically compute and display your results
  3. Review results. Review the calculated results and any additional information provided

Frequently asked questions

Does 'Ultra Lucky' work on Huge Pets?

Generally, no. In Pet Simulator X, most Luck Gamepasses explicitly state they affect 'Base Egg Odds' (Rares, Epics, Legendaries, Mythicals). Huge Pets usually have a fixed server-side roll that is unaffected by your personal luck passes, unless an event specifically says '2x Huge Chance'.

What is 'Pity System'?

Some eggs have a Pity System (e.g., hatch 5,000 eggs to guarantee a Huge). However, this is rare and usually only applies to specific Event Eggs or Exclusive Eggs (Robux eggs). Standard coins eggs do not have a hard pity for Huges.

Is Triple Hatch worth it?

Yes. Triple Hatch (or Octuple Hatch) literally multiplies your speed by 3x or 8x. Since Huge Pets are a numbers game (quantity of hatches), hatching 8 eggs at once gives you 8x better chances per minute than hatching 1.

How accurate are the '1 in X' odds?

The developers rarely publish exact numbers. The community estimates odds based on millions of hatches. A Base Huge is typically estimated at 1 in 10,000,000 or worse depending on the egg.

What is 'Server Luck'?

Server Luck (often from Boosts) applies a multiplier to everyone in the server. This often DOES STACK with personal luck and event luck.

What is the 'Shiny' chance?

Shiny chance is separate from rarity. It's roughly 1 in 500 to 1 in 1000 for any pet to spawn as Shiny. The 'Shiny Hunter' gamepass significantly improves this.

Can I hatch a Titanic F2P?

Extremely unlikely. Titanics are almost exclusively from Exclusive Eggs (Robux) or Merchandise Codes. Very rarely, an event might offer a hatchable Titanic with odds like 1 in a Billion.