Player-input estimate

My Slime Lab Sales & Unlock Calculator

Two calculator modes estimate offline sales and unlock time from values you enter — the arithmetic is shown, the inputs stay yours, and every result is labeled an independent estimate. Checked October 9, 2026.

Offline Sales is the default task: enter a slime's sale value, your selling pace, your time away, and an optional cap. Unlock Budget divides the gap between your balance and a target by your earning rate. The tool exists because My Slime Lab pays out through selling — slime keeps selling while you are offline at a documented +25% goo bonus per friend — and neither the official page nor any public source publishes an earning formula you could plug numbers into instead.

My Slime Lab Sales & Unlock Calculator

Choose a mode and enter only values you have observed. Every result is local arithmetic, not an official game formula.

Method: offline sales multiply your entered value, pace, and effective hours; unlock time divides the remaining amount by your entered rate.

Limit: these estimates do not infer official caps, boosts, sale rules, or live progress that you did not enter.

Methodology

How the math works

Both modes are deliberately simple arithmetic so you can audit every step. Nothing here estimates game rules the sources do not state.

Offline Sales mode

The estimate multiplies three of your entries: sale value per slime × slimes sold per hour × effective hours. Effective hours equal your time away, reduced to your entered cap if you provide one — the cap field exists because many Roblox games limit how long offline earnings accumulate, while My Slime Lab's sources name the offline mechanic without stating a cap length, so the tool lets your observation decide. A zero in any field flows through honestly: a zero pace means zero estimated sales, and a zero cap means zero counted hours.

Unlock Budget mode

The estimate subtracts your current balance from the target cost you enter, shows your progress as a percentage, and divides the remaining gap by your observed earning rate per hour. A remaining gap of zero reports ready-now; an earning rate of zero reports an uncountable time instead of dividing by zero. Use it for any priced goal — the next machine, a customization unlock, or a Shop Builder part from the Walls + More update.

Documented inputs

Which numbers are official, and which are yours

The official description, checked October 9, 2026, gives the mechanic and one rate — the rest comes from your session.

Input	Source	How to get it
Offline sales exist; slime sells while you are away	Official description	Leave the game, come back, and collect — the loop the description advertises in caps.
+25% goo per friend	Official description (restated on the Walls + More event page)	The only official rate. Estimate a different friend count by scaling your observed base: base × (1 + 0.25 × friends). If you copied the value from a session that already had friends in the server, it may include the bonus already.
Sale value per slime	Your session	Watch one offline collection and note what each slime paid.
Slimes sold per hour	Your session	Compare collections two hours apart and divide the difference.
Offline cap	Your session	Leave blank until you observe earnings stopping; no official source states a cap length.
Target cost and balance	Your session	Read the price tag of the unlock you want and your current goo on screen.

Worked example

A full estimate, start to finish

Illustrative values from an example session — they show the arithmetic, they are not official game constants.

Offline sales

Say one slime sells for 150 goo, your collection log shows 10 slimes sold per hour, and you will be away for 8 hours with a 6-hour cap you observed earlier. Effective hours = min(8, 6) = 6. Slimes sold = 10 × 6 = 60. Gross sales = 150 × 60 = 9,000 goo. The result panel also reports that 2 hours were excluded by your cap, so you can compare a shorter, mid-day collection against a longer overnight one. If that session had 2 friends in the server and you want a solo baseline, divide by 1.5 (1 + 0.25 × 2) to get roughly 6,000 goo.

Unlock budget

Say your balance is 5,000 goo, the customization unlock you want costs 20,000, and a normal hour of selling plus one Order Counter round pays you about 2,500 goo. Remaining = 20,000 − 5,000 = 15,000. Progress = 5,000 ÷ 20,000 = 25%. Time = 15,000 ÷ 2,500 = 6 hours of active play. The permanent 2x + 4x goo multiplier from perfect orders changes the rate you enter — keep using your observed post-multiplier pace rather than adjusting the tool, because the multiplier is documented as a reward you earn, and your session numbers already reflect whatever you have unlocked.

Interpretation

Reading and using the results

Recalculate after every update

The September 8 machines, the Order Counter economy, and any future patch can change how fast goo moves. Re-measure your sale value and pace after each update before trusting an old estimate.

Compare, then decide

Run the same inputs with and without a cap, or at one friend versus four. The differences tell you whether your next session is better spent inviting friends, chasing perfect orders, or simply staying away longer.

Keep the boundary honest

The tool estimates money and time; the offline sales guide explains the mechanic, and the sources page lists what the official description actually documents (6 verbatim lines as of October 9, 2026).

FAQ

Calculator questions

Is the calculator an official My Slime Lab formula?

No. It performs transparent arithmetic using values you enter from your own session.

Why are there no default rates or costs?

Reliable public constants were not available, so blank inputs remain blank instead of becoming guessed values.

How does the +25% goo per friend bonus fit in?

The official description documents the bonus; the calculator does not apply it automatically. Scale your observed base by (1 + 0.25 × friends) when you plan a different friend count.

What should I enter for the offline cap?

Only a cap you observed yourself, such as earnings stopping after an overnight. No official source states a cap length, so the field stays optional.

Do the permanent 2x and 4x goo multipliers change the estimate?

They change your earning rate, not the math. Enter the pace you actually achieve with your earned multipliers, and re-measure after each game update.

Plan your next session

Pair the estimate with the beginner loop guide, check the events reference for the Order Counter rules and the permanent goo multiplier, and review the official game page for That Ver's Villainy's latest description before spending a long offline window.