Rebirth ROI Calculator
Enter your current $/s and see exactly how long each rebirth will take and which one is the best time investment.
The Steal a Brainrot rebirth calculator tells you exactly how long each of the 18 rebirths will take based on the cash-per-second number shown in your HUD and however much cash you already have saved. Enter those two values and the table fills instantly with the cost for every level — from Rebirth 1 at $500K all the way up to Rebirth 18 at $10 Quadrillion — plus an estimated time to reach each one. The calculator also highlights the single cheapest next rebirth so you always know which one gives you the fastest payback for your current income.
Each rebirth requires not only cash but also specific brainrots in your collection: Rebirth 1 wants Trippi Troppi and Gangster Footera, while later milestones like Rebirth 11 demand Tralalero Tralala and Rebirth 15 requires both Pakrahmatmamat and Heatseeker. Completing a rebirth resets part of your progress but grants permanent boosts that make every future dollar come in faster, so timing your rebirth correctly — when you can recover quickly — is the whole strategy. Use this tool before each rebirth to know exactly when to pull the trigger.
| Rebirth | Cost | Time to reach | Unlocks |
|---|---|---|---|
| R1 | $5.00B | — | — |
| R2 | $1.53M | — | — |
| R3 | $12.57M | — | — |
| R4 | $3.52B | — | — |
| R5 | $100.00M | — | — |
| R6 | $350.00M | — | — |
| R7 | $1.00B | — | — |
| R8 | $5.00B | — | — |
| R9 | $12.53B | — | — |
| R10 | $125250.00B | — | — |
| R11 | $8001.00B | — | — |
| R12 | $3.57M | — | — |
| R13 | $14 | — | — |
| R14 | $40.10B | — | — |
| R15 | $100.50B | — | — |
| R16 | $1 | — | — |
| R17 | $2 | — | — |
| R18 | $10 | — | — |
Frequently Asked Questions
What do I enter into the rebirth calculator?
You need two numbers: your income per second ($/s) and the cash you already have. Your $/s is displayed in the top-left corner of the in-game HUD — just read it and type it in. The current cash field is optional but subtracts what you already have from each rebirth's cost so the ETA is accurate to where you actually are right now.
How many rebirths are there in Steal a Brainrot?
There are currently 18 rebirth levels in the game. The costs climb steeply: Rebirth 1 costs $500K, Rebirth 7 costs $1 Billion, Rebirth 11 costs $800 Billion, Rebirth 15 costs $100 Trillion, and Rebirth 18 reaches $10 Quadrillion. The calculator shows every one of them with its ETA based on your own income.
Do I need specific brainrots to rebirth?
Yes, almost every rebirth has a brainrot requirement on top of the cash cost. Early levels ask for pairs like Trippi Troppi + Gangster Footera (R1) or Boneca Ambalabu + Brr Brr Patapim (R2). Later rebirths demand single powerful brainrots like Bombardiro Crocodilo (R6), Tralalero Tralala (R11), or two rare ones like Pakrahmatmamat + Heatseeker (R15). Make sure you own them before you try to rebirth.
What does the fastest payback recommendation mean?
When you enter your $/s, the calculator highlights the rebirth with the lowest cash cost among all levels you have not yet completed. That is the one you can reach soonest from your current income. It is a quick way to see your next realistic target without scanning the whole table yourself.
Does rebirthing reset all my progress?
Rebirthing resets some of your in-game progress — like your cash and certain upgrades — but it grants permanent boosts that increase your earnings permanently. That means each rebirth you complete makes the next one faster to reach. The calculator helps you time each rebirth correctly so you are not restarting at a point where recovery would take too long.