Dice Roller
Roll virtual dice for games, decision making, and random number generation.
Choose your options and press Roll to generate random dice results.
What is a Dice Roller?
Created & reviewed by Chad Solomon
Last reviewed 12 June 2026
A dice roller rolls dice for you on screen. It gives you random numbers, just like real dice would. Our dice roller works with every common dice type, from D4 to D100. Use it for games, learning, and quick choices. You do not need any real dice.
How to use this digital dice roller
- Select your dice type: choose from D4, D6, D8, D10, D12, D20, or D100 polyhedral dice
- Set the number of dice to roll simultaneously (1–20 dice supported)
- Click the Roll button to generate instant random results
- View individual die results and automatic total calculation
- Use the copy function to save results to your clipboard
- Check roll history to review previous dice combinations
Common Uses for Digital Dice Rolling
Tabletop Gaming
- Dungeons & Dragons (D&D) gameplay mechanics
- Pathfinder and other RPG systems
- Board game probability simulations
- Initiative tracking and combat resolution
Educational Applications
- Probability and statistics lessons
- Mathematics probability experiments
- Random sampling demonstrations
- Data collection and analysis projects
Decision Making
- Random selection and choice generation
- Fair arbitration in group decisions
- Creative writing prompt generation
- Game development and testing scenarios
Professional Use
- Software development random testing
- Statistical analysis and research
- Quality assurance random sampling
- Market research participant selection
Features of Our Advanced Dice Roller
- ✓Complete dice set support covering all standard polyhedral dice (D4–D100)
- ✓Multiple dice rolling up to 20 dice simultaneously with automatic totalling
- ✓Roll history tracking to review previous results and patterns
- ✓One-click result copying for sharing and record keeping
- ✓Mobile-responsive interface for gaming anywhere, anytime
- ✓Pseudorandom algorithm ensuring fair and unbiased results
Polyhedral Dice Types Explained
Standard Gaming Dice
D4 (Tetrahedron): A four-sided pyramid die. It rolls a 1 to 4. People use it for small damage rolls.
D6 (Cube): A six-sided die. It rolls a 1 to 6. This is the most common die. You see it in most board games.
D8 (Octahedron): An eight-sided die. It rolls a 1 to 8. People often use it for medium damage rolls.
Advanced Gaming Dice
D10 (Pentagonal Trapezohedron): A ten-sided die. It rolls a 1 to 10. It works well for percentages.
D12 (Dodecahedron): A twelve-sided die. It rolls a 1 to 12. People use it for high-damage weapons.
D20 (Icosahedron):A twenty-sided die. It rolls a 1 to 20. This is the main D&D die for skill checks and attacks.
How the Dice Roller Works
Every time you press Roll, the tool calls JavaScript's Math.random(), which returns a floating-point value uniformly distributed between 0 and 1. That value is multiplied by the number of faces on the selected die and floored to an integer, then 1 is added so the result lands in the range 1–N (not 0–N−1). Each die in a multi-dice roll is independent — the outcome of one die has no influence on any other. When you roll 2D6, for example, each of the two dice goes through exactly the same process, giving 36 equally likely combinations.
All rolling happens entirely in your browser — no result is sent to or recorded on a server. For the technical specification of the underlying algorithm see the MDN Web Docs page on Math.random().
Example Dice Rolls and Common Uses
To show the range of what this roller produces, here are three real-world scenarios alongside sample outcomes:
- D20 roll of 17— a high result on an attack check in Dungeons & Dragons; with a +5 modifier the final value would be 22, enough to hit most enemies. Roll the D20 here and add your own modifier manually.
- 2D6 roll showing 4 and 3 (total 7) — the most likely outcome when rolling two six-sided dice (see the probability table below). In board games like Catan, a total of 7 triggers the robber, making it the most strategically significant result.
- 4D6 roll showing 5, 4, 6, 3 (total 18)— a common method for generating ability scores in D&D character creation. Rolling four D6 and summing all four gives a result between 4 and 24, with the middle values most likely.
Dice Probability at a Glance
The table below shows the probability of each possible sum when rolling two six-sided dice (2D6) — the most common multi-dice combination in board games and RPGs. Sum 7 is by far the most likely result, appearing in 6 of the 36 equally probable combinations.
| Sum | Ways to roll | Probability |
|---|---|---|
| 2 | 1 / 36 | 2.8% |
| 3 | 2 / 36 | 5.6% |
| 4 | 3 / 36 | 8.3% |
| 5 | 4 / 36 | 11.1% |
| 6 | 5 / 36 | 13.9% |
| 7 | 6 / 36 | 16.7% |
| 8 | 5 / 36 | 13.9% |
| 9 | 4 / 36 | 11.1% |
| 10 | 3 / 36 | 8.3% |
| 11 | 2 / 36 | 5.6% |
| 12 | 1 / 36 | 2.8% |
Frequently Asked Questions
Q.How does the dice roller ensure truly random results?
Our dice roller uses the pseudorandom number generator (Math.random()) built into your browser. It gives fair, even results. The numbers are good enough for games and lessons.
Q.Can I roll different dice types simultaneously?
Each roll uses dice of the same type. To roll a different type, just pick it and roll again.
Q.Is this dice roller suitable for official RPG gameplay?
Yes. Our dice roller gives the same fair results as real dice. Most gaming groups accept it for online D&D and other games.
Q.How many dice can I roll at once?
You can roll up to 20 dice at once of the same type. We show each result. We also add them up for you.
Q.Which dice types does the roller support?
The roller supports all standard polyhedral dice used in tabletop gaming: D4, D6, D8, D10, D12, D20, and D100. Select the type from the dropdown before rolling.
Q.Are all faces equally likely to come up?
Yes. The roller uses Math.random(), which is uniformly distributed. Every face on a given die has exactly a 1-in-N chance of appearing, where N is the number of sides. A D6 gives each face a 1-in-6 chance; a D20 gives each face a 1-in-20 chance.
Q.Does the roller support modifiers or advantage/disadvantage rolls?
Not currently. The roller shows raw dice results and a total. To apply a modifier, add it to the displayed total manually. For advantage, roll twice and take the higher value; for disadvantage, take the lower.