Model a simple guaranteed-drop pity system for loot and gacha design.
How the calculation works
Enter your game or platform assumptions.
The calculator applies the displayed formula.
Compare the result with related Tool2Do game tools.
Formula
Chance is modeled as repeated attempts with a linear pity ramp toward a guaranteed attempt.
Example
A 1% base rate with pity starting at 50 and guarantee at 90 reaches 100% by attempt 90.
Understanding your result
Use the output as a practical starting point, then review it before using it in an important workflow.
Game engine export
This gaming tool can export the visible result as structured JSON or CSV, plus text-based Unity, Unreal, and Godot snippets. The export is generated in your browser from the current result and is meant as a clean starting point for prototypes, balancing sheets, and engine-side data tables.
Assumptions and limitations
This is simplified planning math only.
Use aggregated inputs. Do not paste private player or account data.
Frequently asked questions
Does this require an account?
No. The core tool works without creating a Tool2Do account.
Is my input included in share links or analytics?
No. Tool2Do share actions use the tool page URL and safe metadata, not private values or uploaded files.