Slime RNG Wiki

Slime RNG Luck Calculator

Free Slime RNG Luck Calculator. Toggle every luck source you have stacked - permanent perks, code potions, roster passives, rebirth multiplier - and read your effective luck multiplier instantly. Last checked 2026-05-03

Get a Luck Boost code luck sources guide

luck stack

Tick every luck source currently active for you. Output is multiplicative across permanent + temp + passive multipliers.

Effective luck multiplier
2.00x
base 1 + 1 (Like) + 0 perm bonus, x1 mult chain
Huge slime odds (1-in-1,000,000 base)
~1 in 500,000
base ÷ effective luck

Final number is an estimate. Several multipliers are flagged needs_check because Stouts Studio has not published official figures.

How this calculator works

effective_luck = (base_luck + sum(permanent_add)) * product(permanent_mult) * product(temp_mult) * product(passive_mult)

Permanent +Luck adds before any multiplier is applied. Permanent, temp, and passive multipliers all multiply together. This Slime RNG Luck Calculator divides the 1-in-1,000,000 Huge slime base odds by the effective luck multiplier to give a relative-improvement read.

Rebirth coin projection

Rebirth coin projection. Estimate how many enemy clears you need to fund the first rebirth (10M coins) given your current zone payout.

First Slime RNG rebirth threshold: 10,000,000 Coins (single_source_independent_wiki).

Use the worlds table to estimate kills required: in Tundra (1,500 Coins/kill) you need ~6,667 enemy clears for a first rebirth; in Void (75,000 Coins/kill) you need ~134. Read the full rebirth guide before pulling the trigger.

Luck Calculator FAQ

How accurate is this calculator?
This Slime RNG Luck Calculator uses the multiplicative stacking model reported by slime-rng.wiki. Several multiplier values (Super Luck, Ultra Luck, Lucky Slime, friends-in-server) are flagged needs_check because Stouts Studio has not published official luck math. Treat the output as a relative-comparison tool, not a precise odds engine.
What is a good luck multiplier for Huge slime hunting?
Players reporting Huge slime rolls within 4-12 hours typically run effective luck multipliers above 18x: +2 permanent (Like + Group), x3 Huge Lucky on roster, x2 Luck Boost from a code, x1.5 friend bonus. Plug those toggles into this calculator to see your stack.
Should I rebirth before using this calculator?
Yes, rebirth permanently multiplies your Slime RNG luck and the multiplier compounds with every other source on this calculator. See the rebirth guide for when to pull the trigger.

Related Slime RNG guides

Active Codes Grab a Luck Boost or Ultra Luck Boost code to plug into the temp_mult slot above. Luck Sources Reference table of every permanent, temporary, and roster luck source in the game. Rebirth Guide See how each rebirth multiplies your stack and when the math says rebirth. Huge Slime Hunting Take the calculated multiplier into a focused 1-in-1M Huge slime hunt window.