Calc Den

Calc Den is for Roblox players who want a number instead of a guess. Most of it covers Steal an Egg. The income calculator gives a pet's money per second from its weight and mutation, works backwards to the weight you'd need for a target income, and totals your whole pen. The speed calculator shows speed per step from your treadmill, trail and multiplier, how many steps it takes to reach each biome, and which upgrade to buy next.

Alongside the calculators are reference tables: all 265 pets with rarity, biome and base weight, every egg by biome with its spawn chance and base income, the mutations (Rainbow, Golden, Silver and the rest) with their odds and size bonus, and every treadmill and trail with its price and the Robux speed multipliers.

The second game is Dandy's World. Its Research and Unlock Planner tells you how much Research and Ichor you still need for a Toon or Trinket, and roughly how many floors and runs that takes. A Toon list covers each one's Ichor price and requirements. The site says more games are on the way.

Each tool shows its formula, and the data is checked against each game's wiki, with the date of the last check on every page. Pet data comes from the Steal an Egg Wiki on Fandom under CC BY-SA 3.0, and Calc Den shares its compiled tables under the same licence. That's a good sign for a fan tool, since you can see when the numbers might be stale after a game update.

Calc Den states that it isn't affiliated with or endorsed by Roblox Corporation or the games' developers, and that the pet pictures are in-game art belonging to the game's creators. The calculators are free to use.