Example Data Table
| Type |
Name |
Collection |
Cost Or Price |
Float Data |
| Input |
Sample Restricted Skin |
Dust Collection |
$2.10 |
0.082000 |
| Input |
Sample Restricted Skin |
Lake Collection |
$1.85 |
0.095000 |
| Output |
Sample Classified Skin |
Dust Collection |
$28.00 |
0.00 to 0.40 |
| Output |
Sample Classified Skin |
Lake Collection |
$18.50 |
0.06 to 0.80 |
Formula Used
Total cost = sum of all ten input skin costs.
Average input float = sum of input floats ÷ 10.
Collection chance = number of inputs from that collection ÷ 10.
Outcome chance = collection chance ÷ number of listed outputs in that collection.
Output float = min float + average input float × (max float - min float).
Net price = market price × (1 - sale fee rate).
Net EV = sum of outcome chance × net outcome price.
Expected profit = net EV - total input cost.
ROI = expected profit ÷ total input cost × 100.
How To Use This Calculator
Enter a name for your contract. Add your currency symbol, sale fee, target ROI, and precision.
Fill all ten input skin rows. Use current market costs and exact floats for better results.
Add all possible outputs for each input collection. Keep collection names consistent across both sections.
Press the calculate button. Review expected value, profit chance, ROI, break-even value, and outcome floats.
Download CSV or PDF reports when you want to save or compare contract ideas.
About This Calculator
A trade up contract calculator helps compare ten input skins against possible output skins. It is useful when prices, float ranges, and collection mixes change often. The tool estimates total input cost, average input float, expected value, sale fee impact, profit chance, and return on investment. It also shows how each outcome receives its probability.
Why Trade Up Planning Matters
A contract may look profitable because one rare output has a high price. Yet the same contract can lose value when common outputs are cheaper. Good planning checks every possible output, not only the best one. The calculator gives a clearer view of the whole pool. It also helps test several collection combinations before buying inputs.
Float And Wear Control
Float is a major part of trade up value. The output float depends on the average float of the ten inputs. It is then mapped into each target item's float range. This means low input floats can create better wear results. High input floats can push outputs into lower wear classes. Always compare the predicted output float with market demand.
Expected Value Review
Expected value is the weighted average of all possible output prices. The calculator first finds each collection share from the ten input items. It then divides that collection share across matching outputs. After that, it subtracts the marketplace sale fee. The final result shows whether the contract has a positive or negative edge.
Using Advanced Options
The fee field lets you model marketplace deductions. The target ROI field helps estimate a fair maximum input budget. The precision field controls rounded results. Currency input keeps values readable for different markets. You can export the result as CSV or PDF for later review.
Practical Limits
This calculator uses the outcome list you enter. It does not fetch live market prices. Prices can move quickly, especially after game updates or demand spikes. Treat the result as a planning estimate. Check current prices before making any purchase. Also confirm item eligibility, rarity level, StatTrak status, and collection rules before submitting a real trade up contract. For best results, keep a saved price note, then update it when listings change, supply drops, or new skins shift demand before buying.
FAQs
What is a trade up contract calculator?
It estimates trade up cost, output odds, average float, expected value, and possible profit. You enter ten inputs and possible outputs. The calculator then applies probability and fee rules.
Does this calculator fetch live market prices?
No. You enter prices manually. This keeps the tool flexible for different markets, currencies, and private price lists. Always check live prices before buying skins.
Why do collection names matter?
Collection names connect input skins to possible outputs. If six inputs come from one collection, that collection gets sixty percent of the output pool before its outcomes are split.
How is output float calculated?
The calculator averages all ten input floats. It then maps that average into each output skin's minimum and maximum float range. This predicts the final output float.
What does net expected value mean?
Net expected value is the weighted average output value after sale fees. It is more realistic than gross value because marketplace fees reduce actual proceeds.
What is profit chance?
Profit chance is the total probability of outputs where net sale value is at least equal to input cost. It does not guarantee profit.
Can I use StatTrak inputs?
Yes. Choose StatTrak in the input type field. Make sure all entered inputs and outputs follow the same valid contract type rules.
Why is my ROI negative?
Negative ROI means the net expected value is below your total input cost. The contract may still hit a profitable output, but its average return is unfavorable.