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

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.