Cases in CS2 are all about the unknown and the unexpected. But approaches to them can vary. Some choose a case without even looking at the list of skins it contains. Others spend a long time studying the contents and choosing the most profitable one. As a rule, the second approach is always better. All standard cases in the game operate according to the same mathematical model, and understanding it makes them more predictable.

Basic Numbers That Work for Any CS2 Case

Valve doesn’t hide this data. CS2 case odds are the same, whether it’s an old Gamma Case or the latest Gallery Case. Here are the numbers to remember:

• Blue skins (Mil-Spec rarity) — the chance of getting such a skin is approximately 79.92%. This means that four out of five attempts will yield a Mil-Spec skin.

• Purple skins (Restricted rarity) — approximately 15.98%.
• Pink skins (Classified rarity) — 3.2%.
• Red skins (Covert rarity) — 0.64%.
• Gold (knives/gloves) — 0.26% (meaning approximately once every 385 cases).

Many skins are available in the StatTrak version. But StatTrak also doesn’t lend itself to precise calculations.

How to Figure Out if a CS2 Case Is Worth Opening

Case probabilities alone mean little until they’re applied to real prices. To get a sense of the situation, let’s take the average price of each skin in the case, from the cheapest blue to gold. This isn’t based on how much the seller wants to get, but on the price the skin actually sold for over the past 24 hours. The calculation then goes like this: take each skin, multiply its price by the probabilities. Then, simply add all these numbers together. The result is a single figure—the average return on each case, if you open them multiple times. If this figure is less than the price of the key plus the price of the case itself, then there’s no point in talking about breaking even.

For example, a case costs $2, and the key costs another $2.50. That’s a total of $4.50. Most popular cases have an average return of $2.50 to $3.50. Simply put, you lose $1 or $1.50 with each attempt. This is the cost of the process itself, and it’s not surprising if you understand it.

CS2 cases containing expensive gold items are a different story. Cases containing expensive gloves, such as the $7,000 Sport Gloves | Vice from the Revolution Case, have a significantly higher expected cost of opening than cases containing cheap knives for $150.

What Specifically to Look for in a CS2 Case’s Contents

The first thing to pay attention to is, of course, the knives and gloves. It’s worth checking out what exactly these items are and how much they cost. If the best you can hope for is some cheap knives for $100, then there’s no point in expecting a particularly valuable result.

Next, consider the red skins. In a good case, they’re at least worth something and look decent. If top-end skins are priced at $10-15, that’s a warning sign. You’ll likely just be wasting your money on keys. A good example is the Revolution Case. It has expensive gloves and decent, non-junk red skins, like the AK-47 | Head Shot or M4A4 | Temukau. That’s why this 2023 case is so popular.

Active Pool and CS2 Case Price

This is another point that players often forget: cases from the active pool (those players receive in-game) are usually worth next to nothing. The Kilowatt Case can be purchased for $0.25. The entry fee is cheap, and players can open it multiple times. Cases from a rare pool can be worth much more on their own, for example, $5, $10, or even more. For example, the Operation Wildfire Case costs around $4, while a key for it costs around $15-18. Opening it is pure madness from a mathematical standpoint. Your loss begins not with the key, but from the moment you purchase the case. It’s more profitable to sell such cases than to open them.

Conclusion

Opening cases in CS2 isn’t a way to earn money, but rather a way to have a good time and get one of the in-game items. If you’re approaching this with a plan, it’s worth considering the case’s contents and its probabilities. This will give you at least a basic understanding of what you can get. Furthermore, if you don’t like any skin in a case, there’s probably no point in opening it. CS2 has a lot of cases, and you’re likely to find something you like in another. Overall, the average ROI for the most popular cases hovers around 50-70% of the cost of the key and the case itself.