Dice Probability Calculator
With this dice probability calculator, you can easily find the various probabilities related to rolling a set of dice.
What Dice Probability Calculator does
A dice probability calculator that determines the likelihood of specific outcomes when rolling any combination of polyhedral dice. Users input the number of dice, their face type (from 4-sided to 20-sided or custom), and the desired result condition — such as an exact sum, a minimum or maximum total, or a set number of dice showing a specific value. The output provides the calculated probability for the chosen condition, helping users understand the statistical chances of various roll configurations. The tool supports both standard cubic dice and the full range of polyhedral shapes used in gaming and education.
How to use the Omni Calculator Dice Probability Calculator
- 1
Select the type of die from the dropdown menu (Tetrahedron, Cube, Octahedron, Decahedron, Dodecahedron, Icosahedron, or Custom)
- 2
Enter the total number of dice being rolled in the designated field
- 3
Choose the specific outcome condition from the 'I want to get' options (e.g., exact sum, at least value, at most value, or matching individual dice)
- 4
View the calculated probability result displayed on screen, which can be shared or reset using the provided controls
Best for
Students, game designers, and statistics enthusiasts who need to quickly calculate probabilities for custom or standard polyhedral dice without manual computation.
Limitations
- Results are estimates based on mathematical probability distributions
- No physical dice rolling or tactile randomness involved
- Custom die faces require manual specification and are not pre-configured
Dice Probability Calculator FAQ
- Can this calculator handle non-standard dice like custom face counts?
- Yes, the tool includes a Custom option that allows you to specify any number of faces, making it suitable for unusual polyhedral dice or home‑brewed game mechanics.
- What types of outcome conditions can I calculate?
- You can calculate the probability of an exact sum, a sum that is at least or at most a certain value, or conditions involving individual dice such as 'exactly X dice equal to a value' or 'at least X dice equal to a value'.
- Does the tool account for advantage or disadvantage like in D&D?
- Yes, there is a specific option labeled 'Roll with advantage/disadvantage (D&D option)' that modifies the probability calculation for those mechanics.
- Is the probability result exact or an approximation?
- The probability provided is a mathematical calculation based on all possible outcomes for the given dice configuration; it is exact within the model's assumptions.
Similar tools
Based on shared tags