This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own SpongeBob Tower Defense🍍 session. It will not click the shop.
Material planner
Golden Spatula Chest Planner
Estimate how many more Golden Spatulas you need for Raid Shop Prismatic Treasure Chests. The default price is 3,500 per chest.
Required total = materials per upgrade × number of upgrades. Missing = max(required total − materials already owned, 0).
The default price is the Raid Shop cost of one Prismatic Treasure Chest: 3,500 Golden Spatulas, with a reported limit of one purchase per day. Change the numbers if the shop price on your account is different. This form does not read your inventory. The Rodent costs 35,000 spatulas and the Shiny Wumbo Rodent costs 50,000; those are separate purchases.
Drop probability
Trait Roll Odds
Estimate the chance of seeing a trait at least once across independent rerolls. Enter the published percent for the trait you are hunting.
Chance of at least one success = 1 − (1 − chance per attempt) raised to the number of attempts.
The default 0.01 is the published regular-roll chance for Neptune's Crown, not a generic rate. Other published regular chances: Secret Formula 0.25, Sidekick 0.75, Vortex 1, Sea Bear 2, Scurvy 0.25. Golden rolls use a different table, such as Neptune's Crown 0.05 and Secret Formula 1.5. Each attempt is treated as independent. Pity, trait locks, and the golden pool are not included.