FGO summon probability calculator (North American version · Featured SSR)
For a single featured SSR in the North American version of Fate/Grand Order, enter its rate, your current count, your planned summons, and the additional number of copies you want to calculate the probability of getting them and the number of summons needed. You can copy the results or save them as TXT.
For NA single-SSR pickup banners with the repeating 330-summon guarantee introduced July 4, 2026. Each copy of the target resets the count; another SSR does not. Normal summons use the rate you enter. Include bonus summons and stay within the same pickup lineup.
Calculation sourceWhat you can do
Calculate using the target SSR's rate
Enter the in-game rate and the number of summons since you last got the target SSR. 0.8% is an example initial value.
Include the repeating 330-summon guarantee
The count resets when you summon the target SSR, and the calculation finds the probability and required summons for the additional copies you want.
How to use
Enter your current count and target number
Enter the number of pulls since you last got the target and the additional number of copies you want.
Specify your planned pulls
Enter the number of additional summons you plan to make. For FGO, also check the summon rate.
Check the probability and required pulls
Check the probability at each pull count in the results and graph. Copy the results or save them as TXT if needed.
When to use it
When you want multiple additional copies of the target SSR
Enter the additional copies you want, excluding those you already own, to check the probability of getting them on the same summon banner.
Compare counts including bonus summons
Count an 11-pull as 11 summons and check the result for your planned number of summons.
Calculation conditions and how to read the results
This calculation uses North American conditions
This calculation covers the repeating 330-summon guarantee for a single featured SSR introduced in July 2026. It does not automatically apply to other regions or summons outside its scope.
Only the target SSR resets the count
Getting an SSR other than the target does not reset this target's guarantee count. Enter the number of summons on the same banner, including bonus summons.
Frequently asked questions
Should I enter the number of Saint Quartz?
Enter the number of summons. Count an 11-pull as 11 summons. The calculation does not convert this to the number of Saint Quartz or the purchase cost.
Is the rate 0.8% for every summon?
It is an example default value. Check the in-game rate for the target SSR you want to calculate and enter it.
Can I transfer the count to another featured banner?
This calculation uses the conditions for the same summon banner. Do not add counts from other banners; enter the count for the target SSR on that banner.
Inputs and results
- Input
- 1–20 additional copies, your current count, and the number of pulls you plan to make.
- Calculation scope
- North American version · Single featured SSR
- Model
- For single featured SSR banners with a guarantee every 330 summons, introduced in the North American version on July 4, 2026. Summoning the target SSR resets the count to 0 and starts the next guarantee. Other SSRs do not reset it. Normal rolls use the rate you enter. Count summons on the same banner, including bonus summons.