Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Probability
Poisson Probability Calculator
Find the probability that exactly k events occur in a fixed interval, given a known average rate λ. Use it for modeling rare events like customer arrivals, server requests, manufacturing defects, or radioactive decay counts.
Fill in the required fields to see your result.
Probability
Dice Roll Probability Calculator
Compute the probability of rolling any target sum with any number of multi-sided dice. It counts the favorable combinations and divides by all equally likely outcomes, which is perfect for board-game and tabletop RPG design.
Fill in the required fields to see your result.
Key differences
| Poisson Probability Calculator | Dice Roll Probability Calculator | |
|---|---|---|
| Category | Probability | Probability |
| Inputs required | 2 | 3 |
| Result | Probability | Probability |
| What it does | Find the probability that exactly k events occur in a fixed interval, given a known average rate λ. Use it for modeling rare events like customer arrivals, server requests, manufacturing defects, or radioactive decay counts. | Compute the probability of rolling any target sum with any number of multi-sided dice. It counts the favorable combinations and divides by all equally likely outcomes, which is perfect for board-game and tabletop RPG design. |