CS2 Reverse Trade-Up: the inputs for the skin you want
Free · no sign-in
Name the skin you want and work the contract backwards: the exact inputs, the floats they must average for your wear, the odds, and what it costs. Knives and gloves included. Have the ten inputs already? The forward CS2 trade-up calculator prices that contract from your skins.
The calculator runs in your browser; open the page with JavaScript on. Name the skin, knife or glove you want and it lists the contract that makes it: the feeders one grade below with live prices, the pool it competes with, the odds, and the average float the inputs must hit for your wear.
How the reverse works
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Every tradeable skin belongs to exactly one collection, so the contract that produces it is fixed: ten skins one grade below, from that same collection. With a pure contract every skin in the next grade up is equally likely, which makes your odds one in the size of that pool, and mixing another collection in can only dilute them. This page shows the pool your target competes with, the feeder skins with live prices, and the cost of ten.
Hitting the wear you want
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The output float is not the average of your input floats. The game first normalizes each input to its own float range, averages those positions, and maps the result into the target's range. That is why this page speaks in required average normalized float, and then translates it into concrete numbers for the feeder you pick. The details live in float and wear explained.
Knives and gloves too
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Since October 2025, five Coverts from a case produce one item from that case's gold pool, every time. Search a knife here to see which cases can produce it, the pool it competes with, and the five cheapest Coverts to feed the contract. Then sanity check the price with a live price check before you buy anything.
Questions
What is a reverse trade-up calculator?
A normal trade-up calculator starts from ten skins you own and tells you what they might produce. A reverse calculator starts from the skin you want: it finds the collection or case that can produce it, lists the input skins one grade below, works out your odds of hitting that exact skin, and tells you what your inputs' floats must average to land the wear you are after.
How are the odds calculated?
With all ten inputs from the target's own collection, every skin in the next grade up is equally likely, so the odds are one divided by the size of that pool. Mixing in another collection only dilutes your chance, which is why this page assumes the pure contract. Knife and glove contracts work the same way over a case's gold pool with five Covert inputs.
What float do my inputs need?
The game normalizes every input float to its own range, averages those positions, and maps the average into the output skin's range. So a target wear pins the required average normalized float to an interval, and this page translates that into concrete raw floats for each candidate input.
Can a trade-up produce a knife or gloves?
Yes, since October 2025: five Covert skins from a case produce one item from that case's gold pool, every time. Search any knife or glove here to see which cases can produce it and what the five Coverts cost.
Is this calculator free?
Yes. Search any skin, knife or glove, see the full contract and its live prices. No sign-in and no limit.