Tower Heroes [UPD] 🎃 Calculator

Drop probability

Modifier drop chance

Estimates the chance of seeing a stated modifier drop at least once across independent clears. The default 5% is the Easy rate listed for the Halloween Enemies modifier on Halloween Havoc and for the Quiet Quarry modifier. Medium is listed at 10% and Hard at 20% on those same reward tables. This is not a pity counter. Change the percent to any other rate the reward table actually prints.

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Chance of at least one success = 1 − (1 − chance per attempt) raised to the number of attempts.

Each clear is treated as an independent roll at the percent you enter. Halloween Havoc lists Halloween Enemies at 5% Easy, 10% Medium, and 20% Hard. Quiet Quarry lists its map modifier at the same 5/10/20 split. Do not enter a guess when the table does not print a percent.