Game

Drop Rate Calculator

Given a drop chance, find your odds over N attempts and how many tries you really need.

Input

1 chars · 0 words · 1 lines

Output

Drop chance:        1.0000% per attempt
Attempts:           100

P(at least one):    63.40%  in 100 attempts
Expected attempts:  100.0  (average until first drop)

Attempts for 50%:   69
Attempts for 90%:   230
Attempts for 99%:   459

Note: each attempt is independent — "due for a drop" is a myth (gambler's fallacy).

319 chars · 48 words · 11 lines