RNG Calculator

Calculate probabilities and generate random numbers for gaming analysis.

Calculator Mode

Probability Settings

Drop Rate (%)

1 in 100 chance

Number of Attempts

Target Probability (%)

Chance of At Least 1 Drop

63.40%

in 100 attempts

Expected Drops

1.00

No Drop Chance

36.60%

Attempts Needed

For 95% chance299 attempts

50% dry streak69 attempts

90% dry streak230 attempts

Drop Distribution

0 drops

36.6%

1 drops

37.0%

2 drops

18.5%

3 drops

6.1%

4 drops

1.5%

5 drops

0.3%

6 drops

0.0%

7 drops

0.0%

8 drops

0.0%

9 drops

0.0%

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Editorial Note

MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

ðŸ“š

Formula Source: Standard Mathematical References

by Various

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.