Reverse Trade-Up Calculator
Select a skin you want and find all possible trade-up combinations to get it. Calculate required input floats for specific output conditions.
Target Quality
Input: Previous Tier
Select Target Skin
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How Reverse Trade-Up Works
- Select a target skin you want to obtain from a trade-up contract
- The calculator shows all possible input skins from the same case/collection
- Each input float is normalized:
(float - skin_min) / (skin_max - skin_min), then averaged, then mapped to output range - To get a specific exterior, you need input skins with the correct average normalized float
- Probability is based on the number of unique outcome skins in the collection
- Lower input floats result in lower output floats (better condition)
