Example Data Table
| Input |
Collection |
Float |
Cost |
| Skin 1 |
Safehouse |
0.031500 |
$2.10 |
| Skin 2 |
Safehouse |
0.044800 |
$2.40 |
| Skin 3 |
Safehouse |
0.052200 |
$2.20 |
| Skin 4 |
Safehouse |
0.061900 |
$2.30 |
| Skin 5 |
Control |
0.040600 |
$3.00 |
Formula Used
Average Input Float = Sum of ten input floats / 10
Estimated Output Float = Output Minimum Float + Average Input Float × (Output Maximum Float − Output Minimum Float)
Raw Target Chance = (Target Collection Inputs / 10) × (Desired Target Outcomes / Possible Next-Rarity Outcomes) × 100
Expected Gross Value = Effective Chance × Target Value + Remaining Chance × Other Average Value
Net Expected Value = Expected Gross Value − Selling Fee − Total Input Cost
How To Use This Calculator
Enter all ten skin floats. Add each skin cost if you want profit estimates. Type each skin collection. Then enter the target collection and output float range. Set the target max float. Add market values and selling fee. Press calculate. Use CSV or PDF when you need saved records.
Understanding Trade Up Float Planning
A trade up float calculator helps you test a contract before you spend money. It does not promise a win. It gives a clear estimate from the ten input floats and the chosen output range. This matters because the final skin float is not a simple copy of the average. The game scales the average input float into the minimum and maximum float range of the possible output.
Why Average Float Matters
Each input skin adds one float value. The calculator averages all ten values. A lower average gives a lower output float. That can move a result into Factory New or Minimal Wear. A high average may push the result into Field-Tested, Well-Worn, or Battle-Scarred. The tool also checks a target float cap. This helps you decide whether a contract can reach the finish you want.
Using Odds With Float
Float is only one side of the plan. You also need outcome odds. This calculator lets you enter the target collection, the number of possible next-rarity outcomes, and the number of desired target outcomes. It estimates the target chance from your collection mix. When a contract includes skins from different collections, the input count from each collection changes the result pool. The chance shown is a planning estimate.
Cost And Expected Value
A good trade up plan should include prices. Add every input cost. Then enter the expected value of the target result and the average value of other possible results. The calculator subtracts the selling fee and shows net expected profit. It also shows return on investment. Positive expected value does not remove risk. It only means the average result may be favorable over many similar contracts.
Practical Tips
Use current market prices before making a contract. Check whether each skin is eligible for trade up. Use conservative selling fees. Test several average float targets. Keep records with the CSV and PDF buttons. Review the example table to understand the fields. Small float changes can make a large value difference, especially near wear borders. Planning first can protect your balance and reduce avoidable mistakes. Save each tested setup so future contracts are easier to compare against finished market sales and recent price swings.
FAQs
What does this calculator estimate?
It estimates the average input float, possible output float, wear grade, target chance, expected value, fee impact, and return on investment for a trade up contract.
Do I need exactly ten skins?
Yes. A trade up contract uses ten eligible input skins. The calculator checks all ten float entries before showing a clean result.
What is output minimum float?
It is the lowest possible float for the output skin. Many skins do not use the full 0 to 1 range, so this value matters.
What is output maximum float?
It is the highest possible float for the output skin. The calculator scales your average input float inside this output range.
How is target chance calculated?
The calculator uses the target collection input count and desired outcome count. It then divides by ten inputs and possible next-rarity outcomes.
Why can effective chance become zero?
If the estimated output float is above your target max float, the desired float condition fails. The calculator then treats target success as zero.
Does positive expected value guarantee profit?
No. It only suggests a favorable average over many similar contracts. A single trade up can still lose money.
Can I export my result?
Yes. Use the CSV button for spreadsheet records. Use the PDF button for a simple printable result summary.