This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own The Eternal Abyss session. It will not click the shop.
Drop probability
Single-jump consistency
Enter your own success rate for one jump and how many attempts you will spend. The result is an independent-trial estimate that at least one attempt succeeds. It is not a game drop rate.
Chance of at least one success = 1 − (1 − chance per attempt) raised to the number of attempts.
The 25 and 12 defaults are sample inputs, not measured game odds. Replace both with your own count. If a miss resets the whole tower, this estimate is too generous.