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Rolls per minute · Auto Roll · Roll Speed Boost

Roll speed, maxed.

How many rolls per minute you can sustain, what increases that number, and how it interacts with luck multipliers. Numbers below are the same defaults the Luck Calculator uses for expected hunt time.

~2Manual rolls / min
5Auto Roll baseline
7.5With Roll Speed Boost
+50%Boost effect
Calculator-aligned defaultsCommunity-reported

Rolls per minute by state

StateRolls / minSource
Default (no Auto Roll, no boost)2Community-reported (manual clicking)
Auto Roll enabled (no boost)5Calculator default · verified
Auto Roll + Roll Speed Boost7.5Calculator default · verified
Auto Roll + Roll Speed + 2× Luck gamepass interaction7.52× Luck does not affect speed, luck multiplier only

The math

Expected hunt time = 1 ÷ (effective drop rate × rolls per minute).

Example: target slime at 1/24,000, luck multiplier ×30 (Rebirth 1), Auto Roll + Roll Speed Boost active (7.5 rolls/min). Effective drop rate = 30 / 24,000 = 1/800. Expected hunt time = 800 / 7.5 ≈ 107 minutes.

Doubling your rolls-per-minute halves the expected hunt time. Doubling your luck multiplier halves it too. Stack both whenever possible.

Editor’s note

Roll speed gets ignored because luck looks more glamorous. Don’t. A ×1.5 roll-speed boost is mathematically identical to a ×1.5 luck multiplier when computing expected hunt time. Pop Roll Speed Boost in the same window as Ultra Luck Potion, they compound.

The Slime Desk · 2026-05-15

Roll speed FAQ

What is the maximum roll speed in Slime RNG?
Roughly 7.5 rolls per minute with Auto Roll enabled and a Roll Speed Boost active. Without any boost, Auto Roll runs at about 5 rolls per minute. Roll speed is not affected by luck multipliers.
Does the 2× Luck gamepass increase roll speed?
No. The 2× Luck gamepass multiplies your luck stat (which lowers effective drop denominators), but rolls per minute stay the same.
Is Auto Roll worth buying?
Yes. Auto Roll is the single highest-leverage Robux purchase in the game. It roughly 2.5× your base rolls per minute and lets you idle. The beginner guide ranks it as the only paid upgrade worth buying early.
How does roll speed affect expected hunt time?
Expected hunt time = 1 / (effective drop rate × rolls per minute). Doubling your rolls-per-minute halves your expected hunt time, the same way doubling your luck multiplier does. Stack both.

Compound the rate