Probability Drop Calculator

Calculate exact drop probabilities and expected outcomes.

Drop Settings

Drop Rate (%)

1 in 20 chance

Number of Attempts

Desired Drops

Attempts Needed

For 50% chance14

For 90% chance45

For 99% chance90

Chance of 1+ Drops

92.31%

in 50 attempts

Expected Drops

2.50

+/- 1.54

Dry Streak Chance

7.6945%

0 drops

Probability Details

At least 192.31%

Exactly 120.2487%

At most 127.94%

Distribution

0

7.6945%

1

20.2487%

2

26.1101%

3

21.9875%

4

13.5975%

5

6.5841%

6

2.5990%

7

0.8598%

8

0.2432%

9

0.0597%

10

0.0129%

11

0.0025%