Drop Rate Calculator
Calculate drop probabilities, expected attempts, and luck statistics for rare items.
Drop Parameters
1 in 100 chance
Success Probability
63.40%
Chance of at least 1 drop in 100 attempts
Drop Statistics
Effective Drop Rate1.000%
Expected Drops1.00
Dry Streak Chance36.6032%
Attempts Needed
50% Confidence69
75% Confidence138
90% Confidence230
99% Confidence459
For 1 Drop(s)~100
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.