Stealaneggs Steal An Egg Rare Egg Predictor
This Steal An Egg predictor turns your own rare egg sightings into a next-spawn window with a range — not a single made-up number. It also scores its own past windows, so you can see how often the estimate was right before you trust it. Everything runs in your browser: no account, no stream, no Discord.
Rare egg window calculator
Quick estimate
One sighting and an interval are enough. Uncertainty grows every cycle: ±2 minutes over 3 cycles is ±6 minutes.
Enter a time like 14:05 or a number of minutes.
| Cycle | Around | Range |
|---|
Your observations
| Cycle | Around | Range |
|---|
Sightings on this server (0)
Prediction scorecard
Every sighting you log scores the window that came before it: on time if it landed inside the window, otherwise early or late. When a window passes with no sighting, mark it missed or not watching — "not watching" is left out of the hit rate.
If it did appear, log the sighting above — it is scored automatically as on time, early or late.
Hit rate
Scored
Mean error
Based on 0 windows you scored.
| Predicted | Actual | Result | Error |
|---|---|---|---|
| No scored windows yet. Log sightings above; each new one scores the window before it. | |||
What is actually confirmed
Every claim this tool relies on, with its status, how to use it and the date we last checked it. For what is known about rarity chances, see the hatch odds guide. For event timing that is on a fixed schedule, see the spawn time mechanics.
| Rare eggs spawn every 5 minutes | Former official | Several guides quote this line from an earlier official Roblox game description; the current description no longer includes it. Treat 5:00 as a cadence reference and sync it to your own server. | 2026-09-28 |
| When the next rare egg will appear | Never published | Never published by the game. Log visible spawns instead. | 2026-09-28 |
| Normal (non-rare) nest interval | Unverified in game | Not confirmed, and sources disagree: wiki 5 min, IGN about 4.5 min per night, Eldorado 4 min 50 s plus a 10 s night. Measure it on your own server and log it. | 2026-09-28 |
| Secret 0.051% / Eternal 0.046% / Divine 0.008% hatch odds | Corrected | We checked the Roblox badge data before quoting: these are badge win rates, not hatch odds. The Welcome badge every player gets shows 0.083%, so a win rate is not a per-hatch chance. Today's values are Secret 0.038%, Eternal 0.029%, Divine 0.006%. Do not use them as a probability. | 2026-09-28 |
How the estimate works
For one target on one server label, the gaps between consecutive sightings are sorted. The next spawn is estimated at last sighting + median gap, and the window runs from last + 25th percentile to last + 75th percentile of those gaps — widened to at least ±1 minute so a tiny sample can still be scored.
Looking further ahead, uncertainty adds up every cycle: ±2 min × 3 cycles = ±6 min. After a server hop, start a new server label — samples from different labels are never mixed. Confidence depends only on how many sightings you have: fewer than 5 is Low, 5–14 is Medium, 15 or more is High. With exactly two sightings there is a single gap, so the minimum and maximum are the same — treat that window as a rough guess.
Should you leave now?
Enter how long it takes you to reach the nest and how much buffer you want. The planner works back from the start of the next window to give you a leave-by time, your estimated arrival and how much slack you have. If the egg sits in a biome you cannot enter yet, a window does not help — use the speed calculator to see how long until you unlock it. Not sure the egg is worth the trip? Check its pet values.
Enter a time like 14:05 or a number of minutes.
Log sightings or fill in the quick estimate above to plan a departure.
Why this is not a live radar
Live radars are 24/7 video streams that watch the stock for you and push alerts. They can be faster, and they need a stream and often an account. This page does the opposite: it records only the sightings you make, stores them in your browser, and shows the arithmetic behind every window.
FAQ
What does this Steal An Egg predictor actually predict?
It estimates the next visible spawn window for one target and one server label, from timestamps you record. It does not read Roblox, and it does not predict which pet is inside an egg, hatch results, or hidden stock.
Where do the predicted times come from?
Only from sightings you log, stored in your browser. The window centre is the median gap between your sightings, with the middle 50% range beside it.
How many sightings do I need?
Two produce the minimum window; 5 moves the sample to Medium and 15 to High. Fewer sightings mean a wider, less reliable window.
How often do rare eggs spawn in Steal An Egg?
Several guides quote an earlier version of the official Roblox game description as saying rare eggs spawn every five minutes; the current description (checked on the date at the bottom of this page) no longer includes that line. Treat 5:00 as a cadence reference and sync it to your own server — the normal nest interval is not verified.
Is this the same as a live stock radar or a Discord notifier?
No. Live radars and notifier bots watch for you and send alerts. This page records the sightings you make and does the arithmetic — no account, no stream, nothing to join.
Can it predict shop stock or which egg will appear?
No. It can estimate the timing of a visible refresh. It cannot predict item names, quantities, prices, odds, or hidden server stock.
Does it know when I change servers?
No. Use a new server label after a hop. Observations from different labels are never mixed into one sample.
How accurate has it been?
The scorecard shows your own hit rate and average error for the windows you marked. We publish no accuracy claim beyond what your logged scores show.