Tool · session odds · shareable URL
Slime RNG Odds Calculator (Session Planner)
Planning a roll session? Enter your luck multipliers, roll interval, and hours played—this page estimates hit odds over 1h, 6h, and 24h in your browser. Presets below are unofficial planning aids.
Tune target odds, luck, Rebirth multiplier, boosts, roll speed, and session length. Results are planning estimates, not official hidden formulas.
Preset batch public-sources-2026-05 · last reviewed 2026-05-16. Generic Rare, Epic, and Huge rows are planning placeholders only. The Puffy craft row cites a public recipe article; replace values after in-game confirmation.
Results
Estimate only. Enter values to calculate.
Formula disclosure
hitChance = 1 - (1 - effectiveProbability) ^ rolls, where effective probability is base probability multiplied by your entered luck values. No probability cap is applied because no public source confirmed one.
FAQ
Is this calculator official?
No. It is an estimate tool based on user-entered odds and public planning presets.
How is this different from a luck-stack calculator?
Some sites use checkboxes for Like, group join, and potions to output an effective luck multiplier. This tool instead takes your combined multipliers and roll speed, then estimates hit chance over a session (1h, 6h, 24h) and expected time—better for planning how long to play after redeeming a code.
What is session hit chance?
Given your effective probability per roll and how many rolls you make in N hours, it estimates the chance of at least one success during that session. It is not a guarantee—just a planning number.
What does 1 in odds mean?
A base odds value of 1,000,000 means one success per one million rolls before your luck multiplier is applied.
Why are some targets low confidence?
Exact Slime RNG odds can change and many public values need game testing.
What happens when I share the link?
The URL saves your calculator inputs (base odds, luck multipliers, roll interval, session length). Anyone who opens it gets the same inputs filled in locally; numbers are recomputed in the browser. Shared links are unofficial planning aids, not official game formulas or Roblox endorsements.
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