Drop Rate Calculator
Find your odds of getting a drop over many attempts, and how many tries it takes to be reasonably sure.
Inputs
Results
Chance of At Least One Drop
64.15 %
Attempts for 50% Chance
14
Attempts for 90% Chance
45
Attempts for 99% Chance
90
How it's calculated
The chance of at least one drop is 1 − (1 − rate)^attempts. The 'attempts for X%' figures invert that: attempts = ceil(ln(1 − X) ÷ ln(1 − rate)).
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