Calculate the probability of winning with Gacha from the appearance rate and the number of trials.

Enter the appearance rate (%) and the number of trials, and click the "Calculate Probability" button to display the probability of winning one or more times when you draw the gacha for the number of trials.

The occurrence rate can be entered as an integer or decimal percentage between 0 and 100.

You can also enter fractions such as 1/1000, and in the case of fractions, enter in the range of 0 to 1.

The number of acquisitions 0-4 times and 5 times or more are displayed together, so you can check the probability of multiple acquisitions.

Chance of winning 1 or more times when drawing 100 gacha with appearance rate 0.1%: 9.5207852886291%

### Probability of winning by number of wins

Acquisition times | Probability(%) |
---|---|

0 | 90.479214711371 |

1 | 9.0569784495867 |

2 | 0.448769202457 |

3 | 0.014674468415344 |

4 | 0.00035621207114323 |

5 times or more | 6.9560989524042E-6 |