Calculator

Drop rate calculator

Enter a drop rate to see your chance of getting the item in a set number of pulls, how many pulls it takes on average, and what that costs. Add the guarantee if the game has one.

Chance of at least one drop in 50 pulls

26%

Average pulls to get it: 70
Pulls for an even chance: 90
Pulls for a 90% chance: 90
Most pulls it can take: 90

Chance of a drop by number of pulls

Pulls along the bottom. The dot is your planned number of pulls.

Calculators for each game

With the game's own rates, guarantee and store prices filled in.

How it works

Each pull is treated as independent, with the same chance every time. The chance of at least one drop in n pulls is 1 − (1 − p)ⁿ. With a guarantee on pull N, the chance is 100% from pull N, and the average number of pulls falls to (1 − (1 − p)^N) ÷ p.

Some games also raise the rate a little in the pulls before the guarantee (soft pity). That isn't modelled here, so for those games the real average is a little lower than shown.

How pity works explains the maths in more detail.

Game pages

The disclosed rates, guarantees and UK prices for every game we cover, with sources.