Probability & Attempts Calculator
Find your chance after repeated attempts, or the attempts needed for a target.
Chance of at least the wanted successes —
Chance of exactly the wanted successes —
Chance of no success —
Expected successes —
Attempts for target chance —
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The curve shows the chance of obtaining at least the selected number of successes.
Common targets
Attempts are rounded up. A likely event is never the same as a guaranteed event.
| Chance | Attempts | Opportunities |
|---|
Assumptions and calculation
Each opportunity is treated as independent and has the same chance. Changing chances, guaranteed outcomes, pity systems and dependent events need a model specific to that situation.