This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own Sell Fries! [Anomaly] π session. It will not click the shop.
Drop probability
Class spin odds
Estimate the chance of rolling a class at least once from a published drop rate and a number of independent spins. The example starts at the published 0.2% Potato King rate across 25 spins.
Chance of at least one success = 1 β (1 β chance per attempt) raised to the number of attempts.
The default 0.2 is the published Potato King rate, not a measured in-game test. The result is the chance of at least one success if every spin is an independent roll at that rate. A paid spin costs 25 Gems. Free and ad spins do not spend Gems, so count only the spins you want in the attempt box. If the Classes station shows a different rate, use that number.
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