Build a 10-skin trade up contract and see the exact output odds, the computed float and wear of every possible result, live market prices, and your real profit after fees. It uses CS2's current (post-October 2025) normalized float math, supports StatTrak, the new 5-skin Covert→knife contracts, and multi-market pricing (Steam, CSFloat, Buff163) — plus a finder for the trade-ups that are actually profitable right now. Free, no login.
Prices:
→ output: Restricted
Contract 0/10
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M4A4 | Converter
The 2018 Inferno Collection · $1.48
Sawed-Off | Brake Light
The 2018 Inferno Collection · $1.48
SSG 08 | Hand Brake
The 2018 Inferno Collection · $1.02
USP-S | Check Engine
The 2018 Inferno Collection · $1.01
AWP | Acheron
The 2018 Nuke Collection · $1.10
MP5-SD | Co-Processor
The 2018 Nuke Collection · $0.23
P250 | Exchanger
The 2018 Nuke Collection · $0.24
P90 | Facility Negative
The 2018 Nuke Collection · $0.14
G3SG1 | New Roots
The 2021 Dust 2 Collection · $3.45
Galil AR | Amber Fade
The 2021 Dust 2 Collection · $4.51
Nova | Quick Sand
The 2021 Dust 2 Collection · $3.99
P250 | Black & Tan
The 2021 Dust 2 Collection · $4.10
M249 | Humidor
The 2021 Mirage Collection · $2.40
MP9 | Music Box
The 2021 Mirage Collection · $2.42
SG 553 | Desert Blossom
The 2021 Mirage Collection · $2.44
USP-S | Purple DDPAT
The 2021 Mirage Collection · $3.69
AUG | Amber Fade
The 2021 Train Collection · $2.44
Desert Eagle | Sputnik
The 2021 Train Collection · $2.47
M4A1-S | Fizzy POP
The 2021 Train Collection · $2.31
R8 Revolver | Blaze
The 2021 Train Collection · $7.17
SSG 08 | Spring Twilly
The 2021 Train Collection · $2.41
Tec-9 | Safety Net
The 2021 Train Collection · $2.34
UMP-45 | Full Stop
The 2021 Train Collection · $2.24
AK-47 | Green Laminate
The 2021 Vertigo Collection · $31.61
Negev | Infrastructure
The 2021 Vertigo Collection · $6.67
Nova | Interlock
The 2021 Vertigo Collection · $7.22
P90 | Schematic
The 2021 Vertigo Collection · $9.12
AUG | Creep
The Achroma Collection · $0.22
Desert Eagle | The Daily Deagle
The Achroma Collection · $0.28
P2000 | Grip Tape
The Achroma Collection · $0.22
P90 | Aeolian Light
The Achroma Collection · $0.22
AUG | Anodized Navy
The Alpha Collection · $39.58
MAG-7 | Hazard
The Alpha Collection · $17.91
PP-Bizon | Rust Coat
The Alpha Collection · $12.97
AUG | Carved Jade
The Ancient Collection · $13.12
FAMAS | Dark Water
The Ancient Collection · $5.71
Galil AR | Dusk Ruins
The Ancient Collection · $6.12
Tec-9 | Blast From the Past
The Ancient Collection · $4.69
AK-47 | Steel Delta
The Anubis Collection · $2.50
AWP | Black Nile
The Anubis Collection · $4.36
MAG-7 | Copper Coated
The Anubis Collection · $1.11
Tec-9 | Mummy's Rot
The Anubis Collection · $1.13
FAMAS | Snake Song
The Arabesque Collection · no price
MAC-10 | Arabesque Mosaic
The Arabesque Collection · no price
Sawed-Off | Lunar Wyrm
The Arabesque Collection · no price
Tec-9 | Sultan
The Arabesque Collection · no price
FAMAS | Hexane
The Arms Deal 2 Collection · $3.58
M4A1-S | Blood Tiger
The Arms Deal 2 Collection · $6.46
P250 | Hive
The Arms Deal 2 Collection · $3.84
SCAR-20 | Crimson Web
The Arms Deal 2 Collection · $3.38
Tec-9 | Blue Titanium
The Arms Deal 2 Collection · $58.83
CZ75-Auto | Crimson Web
The Arms Deal 3 Collection · $2.46
Dual Berettas | Panther
The Arms Deal 3 Collection · $3.58
Glock-18 | Blue Fissure
The Arms Deal 3 Collection · $2.82
P2000 | Red FragCam
The Arms Deal 3 Collection · $2.72
USP-S | Stainless
The Arms Deal 3 Collection · $7.01
AUG | Wings
The Arms Deal Collection · $20.35
MP7 | Skulls
The Arms Deal Collection · $20.63
SG 553 | Ultraviolet
The Arms Deal Collection · $18.59
Desert Eagle | Mint Fan
The Ascent Collection · $0.28
FAMAS | Yeti Camo
The Ascent Collection · $0.25
MP9 | Cobalt Paisley
The Ascent Collection · $0.27
P2000 | Royal Baroque
The Ascent Collection · $0.26
P90 | Reef Grief
The Ascent Collection · $0.25
AUG | Hot Rod
The Assault Collection · $594.68
Negev | Anodized Navy
The Assault Collection · $347.95
Sawed-Off | First Class
The Baggage Collection · $32.01
USP-S | Business Class
The Baggage Collection · $36.21
XM1014 | Red Leather
The Baggage Collection · $48.72
CZ75-Auto | Tuxedo
The Bank Collection · $0.40
Desert Eagle | Meteorite
The Bank Collection · $1.37
Galil AR | Tuxedo
The Bank Collection · $0.75
AK-47 | Wintergreen
The Boreal Collection · $0.85
MAC-10 | Poplar Thicket
The Boreal Collection · $0.13
MP5-SD | Gold Leaf
The Boreal Collection · $0.12
USP-S | Tropical Breeze
The Boreal Collection · $0.45
XM1014 | Copperflage
The Boreal Collection · $0.13
Dual Berettas | Black Limba
The Bravo Collection · $5.53
G3SG1 | Demeter
The Bravo Collection · $5.33
Galil AR | Shattered
The Bravo Collection · $6.96
Nova | Tempest
The Bravo Collection · $6.81
SG 553 | Wave Spray
The Bravo Collection · $7.00
UMP-45 | Bone Pile
The Bravo Collection · $6.68
MP7 | Urban Hazard
The Breakout Collection · $0.48
Negev | Desert-Strike
The Breakout Collection · $0.41
P2000 | Ivory
The Breakout Collection · $0.44
SSG 08 | Abyss
The Breakout Collection · $0.45
UMP-45 | Labyrinth
The Breakout Collection · $0.46
Glock-18 | Reactor
The Cache Collection · $21.36
MAC-10 | Nuclear Garden
The Cache Collection · $14.76
MP9 | Setting Sun
The Cache Collection · $15.91
Tec-9 | Toxic
The Cache Collection · $16.56
XM1014 | Bone Machine
The Cache Collection · $12.71
Dual Berettas | Emerald
The Canals Collection · $48.16
G3SG1 | Violet Murano
The Canals Collection · $33.13
P90 | Baroque Red
The Canals Collection · $30.48
SSG 08 | Orange Filigree
The Canals Collection · $34.70
CZ75-Auto | Emerald
The Chop Shop Collection · $58.34
Five-SeveN | Nitro
The Chop Shop Collection · $34.70
MAC-10 | Fade
The Chop Shop Collection · $86.27
MP7 | Full Stop
The Chop Shop Collection · $36.74
P250 | Whiteout
The Chop Shop Collection · $46.28
AK-47 | Elite Build
The Chroma 2 Collection · $2.12
Desert Eagle | Bronze Deco
The Chroma 2 Collection · $0.37
MP7 | Armor Core
The Chroma 2 Collection · $0.42
Negev | Man-o'-war
The Chroma 2 Collection · $0.42
P250 | Valence
The Chroma 2 Collection · $0.37
Sawed-Off | Origami
The Chroma 2 Collection · $0.35
Dual Berettas | Ventilators
The Chroma 3 Collection · $0.41
G3SG1 | Orange Crash
The Chroma 3 Collection · $0.47
M249 | Spectre
The Chroma 3 Collection · $0.43
MP9 | Bioleak
The Chroma 3 Collection · $0.42
P2000 | Oceanic
The Chroma 3 Collection · $0.51
Sawed-Off | Fubar
The Chroma 3 Collection · $0.39
SG 553 | Atlas
The Chroma 3 Collection · $0.44
Glock-18 | Catacombs
The Chroma Collection · $1.13
M249 | System Lock
The Chroma Collection · $0.72
MP9 | Deadly Poison
The Chroma Collection · $0.62
SCAR-20 | Grotto
The Chroma Collection · $0.78
XM1014 | Quicksilver
The Chroma Collection · $0.68
Pick a rarity and add 10 skins to see the odds, floats and profit.
How the CS2 Trade Up Calculator Works
A trade up contract takes 10 skins of the same rarity and returns one skin one rarity higher. The outputs are drawn from the collections of your inputs, so which skins you put in decides both the odds and the possible results.
The odds formula
Every input adds 1/10 of the weight to its own collection. The probability of any specific output skin is:
P(skin) = (inputs from its collection ÷ 10) × (1 ÷ outcomes in that collection)
That means a collection with fewer possible outputs concentrates the odds — the basis of most profitable trade-ups.
The float (wear) formula
CS2 changed this in October 2025. Each input float is normalized to its own range, the normalized values are averaged, and that average is mapped onto each output skin's own float range:
Because each output has different float caps, one contract can produce a Factory New for one outcome and a Field-Tested for another — so we compute the wear (and price) of every outcome individually. Buying low-float inputs pushes outputs toward Factory New, where high-rarity skins are worth the most.
You put in 10 skins of the same rarity and get back one skin of the next rarity up. The possible outputs come from the collections of your 10 inputs, and the odds are weighted by how many inputs come from each collection.
How are the trade-up odds calculated?
Each input contributes 1/10 weight to its own collection. The chance of a specific output skin = (number of inputs from its collection ÷ 10) × (1 ÷ number of outcomes in that collection). So fewer outcomes in a collection means a higher chance for each.
How is the output float (wear) determined?
Since the October 2025 update, CS2 normalizes each input float to its own range, averages those values, then maps the average onto the output skin’s float range: outputFloat = outMin + avgNorm × (outMax − outMin). A low average float can produce a Factory New, higher-value output — this is the key to profitable trade-ups.
Are trade ups profitable?
Most are not — like cases, the average contract loses money after Steam’s 15% fee. But a minority are genuinely profitable, usually single-collection contracts where a cheap input lands an expensive low-float output. Our finder surfaces the currently profitable ones from live prices.
Can you trade up StatTrak skins?
Yes. All 10 inputs must be StatTrak, and the output is StatTrak. Toggle StatTrak in the calculator to price the contract against the StatTrak market.
Can you trade up to a knife or gloves?
Since October 2025, yes — a new contract takes 5 Covert skins and returns one knife or glove from those skins’ cases. Select the “Covert → Knife” rarity to build one; the calculator switches to 5 input slots and shows the knife/glove outcomes with their odds, float and price.
Which market prices does the calculator use?
You can switch between Steam, CSFloat and Buff163 live prices — the same skin can differ 10–30% between markets, so pick the one you actually buy and sell on for an accurate EV. Prices refresh regularly.
