Independent rolls
Each roll uses the same one-in-N input and does not change the next roll.
RNG Battles Ability Odds Calculator
Enter one-in-N base odds and a roll count to find the chance of at least one hit. The result uses standard independent probability and excludes every unknown game modifier.
Base odds inputs
Chance of at least one ability
Pick a legacy listed ability or enter the one-in-N value shown in your current game. Luck, potions, events, upgrades, and pity are not included.
Assumptions
What this calculator does—and does not—model
It answers a mathematical base-odds question. It does not simulate the current game's unpublished Luck, upgrade, potion, event, or pity behavior.
No hidden modifiers
Luck, potions, upgrades, events, and pity are excluded because current formulas are not published.
Average, not guarantee
Expected rolls equals N, but any individual player can hit earlier or continue missing past that point.
FAQ
RNG Battles odds questions
Is the calculator exact?
The probability math is exact for the one-in-N value and roll count you enter, assuming every roll is independent. The input itself may be a legacy value.
Does the calculator include Luck?
No. The current Luck formula is not published, so Luck, potions, upgrades, events, and other modifiers are excluded.
Does one expected value guarantee the ability?
No. Expected rolls is a mathematical average. You can hit earlier or continue missing after that many rolls.
Can I enter an odds value from the current game?
Yes. Choose Manual current value and enter the one-in-N number shown in your game for the most relevant base calculation.