Loot Drop Probability Calculator
Calculate the probability of getting a rare drop in N attempts.
About this Calculator
Rare item drops are based on independent probability per attempt — which means you might get lucky on attempt 1 or still be grinding on attempt 500. This calculator uses the binomial distribution to show: the probability of getting at least one drop in N attempts, the expected number of attempts to see a drop, and the number of attempts needed to have a 50%, 90%, or 99% chance of success. Demystifies RNG and sets realistic expectations.
loot dropdrop rateprobabilityRNGrare itemgachagaming