Calculate the number of trials required for gacha from the appearance rate and acquisition probability.

You can calculate how many times you have to draw a gacha with an appearance rate of 0.1% to get it with a probability of 80% or more.

Enter the appearance rate (%) and acquisition probability (%) and click the "Calculate probability" button to display the number of times required to acquire.

Appearance rate and acquisition probability can be entered as an integer or decimal percentage from 0 to 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 times in 5% increments by acquisition probability is also displayed in a list, so you can easily check the number of times you need.

### Number of times to win by win probability

Acquisition probability(%) | Number of times |
---|---|

5 | 52 |

10 | 106 |

15 | 163 |

20 | 224 |

25 | 288 |

30 | 357 |

35 | 431 |

40 | 511 |

45 | 598 |

50 | 693 |

55 | 799 |

60 | 916 |

65 | 1050 |

70 | 1204 |

75 | 1386 |

80 | 1609 |

85 | 1897 |

90 | 2302 |

95 | 2995 |

96 | 3218 |

97 | 3505 |

98 | 3911 |

99 | 4603 |