Roblox Slime RNG math, made readable
Slime RNG Luck Calculator & Odds Simulator
Find out how long Mythic, Exotic, Huge, or Inverted slimes take at your luck stack. The simulator runs 10,000 Monte Carlo trials in your browser and turns odds into rolls, hours, and a histogram.
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TL;DR
Slime RNG Guide is a calculator-first fan site for Roblox Slime RNG. Input your luck multiplier, roll speed, and target rarity to estimate median time, 25/75 percent ranges, 95 percent range, and a log-scale roll distribution.
Monte Carlo Roll Simulator
This widget runs 10,000 randomized trials per query. It is faster than manual geometric rolls but still uses randomness for the result distribution.
Odds Quick Reference
| Rarity | Base rate | 50% rolls | 95% rolls |
|---|---|---|---|
| Common | 1 in 10 | ~7 | ~30 |
| Uncommon | 1 in 100 | ~70 | ~300 |
| Rare | 1 in 1,000 | ~700 | ~3,000 |
| Epic | 1 in 10,000 | ~7,000 | ~30,000 |
| Legendary | 1 in 100,000 | ~70K | ~300K |
| Mythic | 1 in 1,000,000 | ~700K | ~3M |
| Exotic | 1 in 10,000,000 | ~7M | ~30M |
| Inverted | 1 in 100,000,000 | ~70M | ~300M |
Methodology Snapshot
Effective rate is modeled as base rate * luck multiplier, capped below certainty. Each query creates 10,000 first-hit samples, sorts them, and reports median, p25, p75, p95Low, and p95High. I rolled 100 times to verify the low-rarity side of the model.
Last updated 2026-05-09. Author byline: Jim Liu. Read the full methodology.
Codes Summary
The currently tracked active code is giveMeLuckNOW, reported as a luck boost, roll speed boost, and apples reward. Codes can expire quickly, so copy carefully and redeem in the shop menu.
Expired: time2Grind, craftAway
Tier Preview
Beginner Guide Preview
- Like the game and join the group before serious rolling.
- Upgrade roll speed before overbuying tiny luck gains.
- Use codes before long sessions.
- Replace Basic Slime quickly.
- Save for rebirth when recovery time is short enough.
FAQ
What is Slime RNG?
Slime RNG is a Roblox RNG game by Stouts Studio where players roll for slimes, stack luck, upgrade roll speed, fight enemy slimes, and unlock new worlds.
How does luck work?
Luck is modeled as a flat multiplier on the base per-roll rate. Five times luck on a 1 in 1,000,000 Mythic target behaves like roughly 1 in 200,000 per roll.
Is the simulator server-side?
No. The Monte Carlo simulator runs 10,000 client-side trials in your browser and does not send roll inputs to a server.
What is the rarest slime?
The Inverted tier is modeled as 1 in 100,000,000. Huge variants are separate rare variants and are covered in the Huge guide.
Are the numbers official?
Some public values are community estimates. I mark estimates, keep formulas visible, and update the site when better in-game evidence appears.