Loot Box Probability Calculator

Loot Box Probability

Calculate the probability of getting a specific item from loot boxes based on drop rates, number of boxes opened, and pity system mechanics.

Item Drop Rate (%)

Boxes to Open

Cost Per Box ($)

Pity System (Guaranteed After)

Formula

Prob(0 drops) = (1 - Drop Rate)^Boxes; Prob(at least 1) = 1 - Prob(0 drops); Expected Boxes = 1 / Drop Rate; Expected Cost = Expected Boxes x Cost Per Box

Frequently Asked Questions

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