- Cost
- $335.99
- EV
- 21%
- $72.15
- Profit
- −$273.26
- after fee
- Win %
- 0%
- to profit
Avg float ≤ 0.024 (needs < 0.028)4 outcomesThin / unstable prices
Reverse trade-up finder
Trade up to M4A4 | Zirka
10 Mil-Spec Grade skins from the Operation Bravo Case collection can become M4A4 | Zirka. Pick a wear to see every realistic route, its odds, cost and the input float it needs.
Prices as of Oct 27, 2026Steam Community Market averages · snapshot 2026-10-27 10:25 UTC
Factory New M4A4 | Zirka needs an average normalized input float below 0.0278 (output float 0.060–0.070). Best chance per contract: 25.0%.
- Cost
- $157.45
- EV
- 36%
- $56.19
- Profit
- −$108.59
- after fee
- Win %
- 0%
- to profit
Avg float ≤ 0.027 (needs < 0.028)9 outcomesThin / unstable prices
- Cost
- $56.25
- EV
- 28%
- $15.91
- Profit
- −$42.41
- after fee
- Win %
- 5%
- to profit
Avg float ≤ 0.025 (needs < 0.028)9 outcomesSome thin prices
- Cost
- $69.33
- EV
- 36%
- $24.88
- Profit
- −$47.69
- after fee
- Win %
- 3%
- to profit
Avg float ≤ 0.027 (needs < 0.028)8 outcomesThin / unstable prices
- Cost
- $96.77
- EV
- 14%
- $13.88
- Profit
- −$84.70
- after fee
- Win %
- 3%
- to profit
Avg float ≤ 0.023 (needs < 0.028)9 outcomesSome thin prices
- Cost
- $134.24
- EV
- 56%
- $74.83
- Profit
- −$69.17
- after fee
- Win %
- 23%
- to profit
Avg float ≤ 0.027 (needs < 0.028)8 outcomesThin / unstable prices
Required input float for each M4A4 | Zirka wear
| Wear | Output float | Avg normalized input float | Cheapest route | Best chance |
|---|---|---|---|---|
| Factory New | 0.060–0.070 | < 0.0278 | $56.25 | 25.0% |
| Minimal Wear | 0.070–0.150 | ≥ 0.0278 and < 0.2500 | $5.88 | 15.0% |
| Field-Tested | 0.150–0.380 | ≥ 0.2500 and < 0.8889 | $4.98 | 25.0% |
| Well-Worn | 0.380–0.420 | ≥ 0.8889 and any | no priced route | — |
| Battle-Scarred | Not possible — outside this skin's 0.06–0.42 float range | |||
The average is over every input's float normalized to its own range. Output float = 0.06 + average × 0.36.
Other trade-up targets in this collection
How CS2 trade-up contracts work
Inputs & odds
10 skins of one rarity become 1 skin of the next rarity (Mil-Spec → Restricted → Classified → Covert). Since the October 2025 update, 5 Covert skins can become a knife or gloves from those skins' case. Each input collection gets its share of the odds (inputs from it ÷ total), split evenly across that collection's next-tier skins.
Float math
Every input float is normalized to its own skin's range — (float − min) ÷ (max − min) — and averaged. Each output's float is its min + average × (max − min), so a restricted-range skin like 0.10–0.20 can only land in the wears its range allows.
Prices, fees & freshness
Values are Steam Community Market averages from the snapshot dated on each page. Profit subtracts the ~13% Steam seller fee. StatTrak™ inputs give StatTrak™ outputs (knives only — gloves have no StatTrak™). Map collections outside weapon cases aren't in DropLabz's dataset yet.
Pick the skin you want in the reverse trade-up finder, check any contract in the trade-up calculator, or compare with opening cases on case ROI and knife odds.