CalcKitSteal a Brainrot Calculator
Your brainrots
Fan-made tool for the Roblox game Steal a Brainrot. Not affiliated with Roblox or the game makers. Income rates are the game's stated values per second; the game is updated often and rates can change.
Income is in-game cash, not real money. Add up to three brainrot types here; if you own more types, run the calculator again and add the totals together.
Example: 2 Tung Tung Tung Sahurs ($25/sec each), 5 Noobini Pizzaninis ($1/sec each) and 3 Lirili Larilas ($3/sec each) → $64/sec, $3,840/min, $230,400/hour, buy cost $6,875.
Behind the numbers
How brainrot income is calculated
Every brainrot earns a fixed amount of in-game cash per second while it sits in your base, and owning more than one of the same brainrot multiplies its income: two Tung Tung Tung Sahurs earn twice as much as one. The total per second is the sum of each brainrot's rate times how many you own, times the mutation multiplier if one applies. Multiply by 60 for per minute, by 3,600 for per hour, and by 86,400 for per day. The buy cost is the sum of each brainrot's belt price times how many you own.
Worked example: (25 × 2) + (1 × 5) + (3 × 3) = 50 + 5 + 9 = $64 per second. Per minute: 64 × 60 = $3,840. Per hour: 64 × 3,600 = $230,400. Per day: 64 × 86,400 = $5,529,600. Buy cost: (3,000 × 2) + (25 × 5) + (250 × 3) = $6,875. At $64 per second the collection pays for itself in 6,875 ÷ 64 = 107 seconds.
Reference
Brainrot income rates
| Brainrot | Rarity | Income / sec | Buy price | Per hour |
|---|---|---|---|---|
| Noobini Pizzanini | Common | $1 | $25 | $3,600 |
| Lirili Larila | Common | $3 | $250 | $10,800 |
| Tim Cheese | Common | $5 | $500 | $18,000 |
| Trippi Troppi | Rare | $15 | $2,000 | $54,000 |
| Tung Tung Tung Sahur | Rare | $25 | $3,000 | $90,000 |
| Ta Ta Ta Ta Sahur | Rare | $55 | $7,500 | $198,000 |
| Trulimero Trulicina | Epic | $125 | $20,000 | $450,000 |
| Blueberrinni Octopusini | Legendary | $1,000 | $250,000 | $3,600,000 |
| Bombardiro Crocodilo | Mythic | $2,500 | $500,000 | $9,000,000 |
| Tralalero Tralala | Brainrot God | $50,000 | $10,000,000 | $180,000,000 |
Rates and prices are the game's stated values and change with updates. The rarest brainrots, such as Strawberry Elephant at $250,000,000 per second, are not in the dropdown — use “Add your own brainrot” for those.
Tips before you buy or steal
Compare brainrots by income per hour, not per second — a $25-per-second brainrot earns $90,000 an hour, which makes the $3,000 price easy to judge.
Work out the payback time: buy price divided by income per second. A brainrot that pays for itself in minutes is a better buy than one that takes hours.
Rarer is not always better value: a Mythic at $2,500 per second costs $500,000, while twenty Tung Tung Tung Sahurs cost $60,000 and earn $500 per second.
Rates in this calculator are the game's stated base values, before traits and mutations. Check the rate shown in the game if a number looks different after an update.
Good to know
Frequently asked questions
What is a brainrot's income per second?
Every brainrot in Steal a Brainrot earns a fixed amount of in-game cash per second while it sits in your base. For example, Noobini Pizzanini earns $1 per second and Tung Tung Tung Sahur earns $25 per second, as shown in the game. Rarer brainrots earn far more: Tralalero Tralala earns $50,000 per second.
How do I work out my total income per hour?
Add up the income per second of every brainrot you own, then multiply by 3,600. Two Tung Tung Tung Sahurs ($25 each), five Noobini Pizzaninis ($1 each) and three Lirili Larilas ($3 each) earn $64 per second, which is $64 x 3,600 = $230,400 per hour.
Do mutations change a brainrot's income?
Yes. In this calculator you can apply a mutation multiplier to your whole base: Gold is 1.25x, Diamond is 1.5x and Rainbow is 10x, based on the game's stated mutation values for brainrots such as Tralalero Tralala. The multiplier applies to every brainrot in the total.
What if my brainrot is not in the list?
Choose 'Add your own brainrot...' in any slot and type the brainrot name and the income per second shown in the game. The game adds new brainrots often, so the list can never be complete — your custom brainrot counts in the total just like a preset one.