CS2 Case Calculator — Calculate Expected Drops
Free CS2 case odds calculator. Enter any number of cases to see expected drops across all rarities and knife probability.
Case Odds Calculator
How the Calculator Works
This calculator uses the official CS2 drop rates to compute expected outcomes. Enter any number of cases and see the expected number of items at each rarity tier, plus your cumulative probability of receiving at least one knife.
Formula
Expected items = Number of cases × Drop rate. Knife probability = 1 - (1 - 0.0026)^N.