Drop Calculator
Calculate how many kills you need to get a drop.
Enter the drop rate shown on the monster's page
Quick Reference
| Drop Rate | 50% Chance | Average | 90% Chance |
|---|
Results
On average, you'll need
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| Chance of Getting Drop | Kills Needed |
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Why 63.2%? After killing exactly 1/rate monsters
(e.g. 5,000 kills for a 0.02% card), you have a 63.2% chance of
getting at least one drop. This comes from the mathematical constant
e — the probability of failure after N = 1/rate tries is
(1 - 1/N)N ≈ 1/e ≈ 36.8%, so success ≈ 63.2%.
This is the statistical average number of kills needed.
Formula: Each kill is an independent event. The probability of getting at least one drop in N kills is:
Note: Even at 99% probability, there's still a 1% chance of not getting the drop. RNG can be cruel!
Formula: Each kill is an independent event. The probability of getting at least one drop in N kills is:
1 - (1 - rate)N
Note: Even at 99% probability, there's still a 1% chance of not getting the drop. RNG can be cruel!