CS2 Case Opening Calculator

Pick any CS2 case to see the real drop odds, the value of every possible skin, and the expected value against the cost to open. Then try the visual opener to see how it feels, using the exact same odds. It is a simulation, so nothing is spent.

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Opening cases is gambling and loses money on average. The return to player is well below 100 percent for almost every case. Values are based on the cheapest available listings online and do not include applied stickers, rare patterns, StatTrak premiums or marketplace fees. The visual opener is a free simulation with no real items and no spending. 18+.

How CS2 case odds work

Every Counter-Strike 2 weapon case shares the same official drop rates. The rarer the tier, the lower the chance, and the knife or glove tier is the rarest of all. Inside each tier every skin is equally likely, so a case with fewer skins in a tier gives each one a bigger share.

RarityDrop chanceRoughly
Mil-Spec (blue)79.92%4 in 5 opens
Restricted (purple)15.98%about 1 in 6
Classified (pink)3.20%about 1 in 31
Covert (red)0.64%about 1 in 156
Rare Special Item (knife or gloves)0.26%about 1 in 385

On top of this, any dropped item has roughly a 1 in 10 chance to be StatTrak, which usually adds value. This calculator prices the normal version, so a StatTrak drop can be worth more than shown.

How we calculate expected value

  • Cost to open. The market price of the case plus a key (about 2.49 dollars). That is what one open really costs.
  • Value of each tier. We take the average market value of the skins in each rarity, priced from the RiskySkins index across 8 marketplaces.
  • Expected value. Each rarity chance is multiplied by that rarity average value, then summed. That is the average you get back per open.
  • Return to player. Expected value divided by cost. Below 100 percent means you lose money over time, and almost every case sits well below 100 percent.

Are CS2 cases worth opening?

For profit, no. The math is built to favour the house, exactly like a slot machine, so across many opens you will spend more than you get back. The excitement comes from the small chance of a Covert or a knife. Treat case opening as paid entertainment, set a budget, and check the expected value here first so you know the real odds before you spend.

CS2 Case Opening FAQ

Common questions about case odds, value and opening.