TBH Drop Chance Calculator
Calculate chest and per-clear Gear drop odds for Base, Hunter, Slayer, or both heroes.Calculate a target drop
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Owned heroes scenario
Select Gear to calculate its published drop routes.
How the TBH drop chance calculator works
Select obtainable Gear, choose the hero-bonus scenario, and enter the number of clears or chest opens you plan to make. Results use the drop routes and percentages stored in the current catalog release.
Per-clear probability
When a stage first drops a chest and that chest can contain the selected Gear, the tool multiplies the stage chest rate by the chest item rate. For example, a 20% chest rate and an 8% item rate produce a 1.6% chance per clear.
Repeated attempts
The “at least one” result is calculated as 1 − (1 − p)ⁿ. It assumes each published attempt is independent and does not model pity systems or unlisted game modifiers.