What Is a Trade-Up Calculator?
A trade-up calculator helps players plan skin trade-up contracts by showing the possible output skins, their probabilities, and the resulting float (wear) values before committing ten input skins. Trade-up contracts exchange ten skins of one rarity for one skin of the next rarity up, with the outcome drawn from the collections of your inputs. This calculator removes the guesswork so you can evaluate whether a trade-up is worth the risk and cost.
How to Use the Calculator
- Add your input skins — their collections and float values.
- Review the possible outputs drawn from those collections.
- Calculate — see each outcome's probability and resulting float.
How Trade-Up Outcomes Work
The pool of possible outputs comes from the next rarity tier within each input skin's collection. The chance of landing a particular skin depends on how many of your inputs come from that collection. The output's float is determined by averaging the input floats and scaling it into the output skin's wear range.
Key Factors
| Factor | Effect on Outcome |
|---|---|
| Input collections | Determine which output skins are possible |
| Number from each collection | Sets the probability of each output |
| Average input float | Scales the output skin's wear value |
Tips for Profitable Trade-Ups
- Use inputs from collections whose outputs are worth more than your total input cost.
- Lower average float often yields a better (less worn) and more valuable output.
- Check current market prices for both inputs and possible outputs before committing.
- Remember trade-ups are probabilistic — even good odds can lose on a single contract.
Frequently Asked Questions
How does a trade-up contract work?
You combine ten skins of one rarity to receive one skin of the next rarity up, drawn from the collections of your inputs with probabilities based on how many inputs come from each collection.
How is the output float calculated?
The average float of your ten input skins is scaled into the wear range of the output skin, so lower input floats generally produce a better-condition result.
How do I calculate trade-up odds?
The chance of each possible output equals the number of inputs from its collection divided by the total, adjusted across all eligible outputs. The calculator computes these probabilities for you.
Can a trade-up guarantee profit?
No — trade-ups are probabilistic. You can stack the odds in your favor with smart input choices, but any single contract can still return a lower-value skin.
Is this trade-up calculator free?
Yes — it is completely free, requires no signup, and shows outcomes, odds, and floats.