Pick the tier. The tier fixes the input rarity and the number of slots required for a legal contract.
CS2 Trade Up Calculator
Simulate any trade up contract. See every outcome, the exact odds, the predicted float and your expected profit before you commit.
Prices updated waiting for catalog
Loading skins and prices
Preparing the current Tradeit catalog.
How to calculate a CS2 trade up
Choose the tier, add the required inputs, set their floats, then compare every possible output. The calculator updates the contract as you work.
The odds come from the collection share of the inputs. Float and value are calculated separately for every possible output.
Add your inputs. Search or filter the live catalog, then use Add or the quantity stepper to fill the contract.
Set the floats. Advanced mode accepts an exact float for every slot. Wear presets are available when you only need a quick estimate.
Read the results. Each outcome shows its chance, predicted float, wear, listed value and profit or loss against the contract cost.
How do CS2 trade up contracts work?
A standard contract takes 10 weapon skins of the same rarity and returns one skin from the next rarity. A Covert contract uses 5 eligible skins and returns a knife or gloves.
Inputs must share the same rarity and quality. The possible output collections are determined by the collections represented in the contract.
| Input tier | Skins needed | Output tier |
|---|---|---|
| Consumer | 10 | Industrial |
| Industrial | 10 | Mil-Spec |
| Mil-Spec | 10 | Restricted |
| Restricted | 10 | Classified |
| Classified | 10 | Covert |
| Covert | 5 | Knife or Gloves |
How the CS2 float formula works
The output float is calculated from the average raw float of the inputs, then mapped onto each output skin's own float range.
f1 + f2 + ... + fnsum / number of inputsmin + average x (max - min)Worked example
If the average input float is 0.12 and an output ranges from 0.00 to 0.70, its predicted float is 0.0840.
0.00 + 0.12 x (0.70 - 0.00) = 0.0840Knife and glove trade ups
Five eligible Covert skins can produce one knife or pair of gloves from the cases represented by those inputs. StatTrak contracts exclude gloves because gloves do not have StatTrak variants.
The outcome pool can be large, so use exact floats and check the probability of each result before committing.
Souvenir trade ups
Souvenir inputs can be used when the selected tier and collection are eligible. All inputs must be Souvenir, and the output is normal quality rather than Souvenir.
The quality selector only enables combinations found in the current catalog.
How to find profitable trade ups
Profit depends on input cost, the complete outcome pool, output prices and any selling fee. A high-value best case does not make a contract profitable by itself.
Compare expected value with total input cost, then inspect the chance of losing money. Prices and stock can move between calculation and purchase.
What changes an outcome value
- Listed output price
- Current Tradeit listing
- Selling fee
- Optional 13% view
- Missing price
- Excluded from EV
Price sources in this calculator
- Input price
- Tradeit item feed
- Output price
- Tradeit item feed
- Stock
- Available quantity
FAQs
What is a CS2 trade up contract?+
A standard trade up exchanges 10 weapon skins of one rarity for one skin from the next rarity. Covert contracts use 5 eligible skins and can return a knife or gloves. Inputs in one contract must use the same quality.
How are trade up odds calculated?+
Each input contributes an equal share to its collection. That collection share is divided between its eligible next-rarity outcomes. The calculator combines those shares to show the probability of every result.
How does input float affect the output?+
CS2 averages the raw float values of the inputs. For each possible result, that average is mapped onto the output skin's minimum and maximum float range.
Can I calculate StatTrak and Souvenir contracts?+
Yes, when eligible items and prices exist for the selected tier. StatTrak inputs produce a StatTrak output. Souvenir inputs produce a normal-quality output under the current trade up rules.
Where do prices and stock come from?+
The item catalog, prices and quantities come from Tradeit's CS2 item feed. Listings can change after a calculation, so confirm the final price and float in the store.
Can this calculator add all inputs to my cart?+
The public feed exposes product listings but not the internal asset identifiers required to construct a cart. The calculator opens the available Tradeit listings until that cart API is available.
Build better CS2 contracts
Understand collection odds, float ranges and outcome pools.
CS2 marketplaceFind contract inputs
Browse Tradeit stock by weapon, wear and price.
Float guideRead float values
See how wear ranges affect skins and trade up outputs.
About this calculator
This tool combines the CS2 trade up rules with Tradeit's item catalog and price feed. Calculations run in the browser as you change a tier, input, float or setting.
Prices are a current market reference, not a guarantee of stock or checkout value.
- Catalog
- Tradeit CS2 items
- Prices and stock
- Tradeit item feed
- Float calculation
- CS2 trade up formula