Dice Roller
Roll virtual dice for tabletop games, RPGs, board games, and more. Includes standard polyhedral dice, custom dice, and advanced options for all your gaming needs.
Dice Roller
Roll Results
Select your dice and click "Roll the Dice" to see results
Guide to Rolling Dice
Standard Dice
- • D4: 4-sided tetrahedron
- • D6: Standard 6-sided cube
- • D8: 8-sided octahedron
- • D10: 10-sided die (0-9)
- • D12: 12-sided dodecahedron
- • D20: 20-sided icosahedron
- • D100: Percentile (usually 2d10)
Common Notation
- • 3d6: Roll three 6-sided dice
- • 2d20: Roll two 20-sided dice
- • 1d8+4: Roll one 8-sided die and add 4
- • 4d6dl: Roll four 6-sided dice, drop lowest
- • 2d20kh1: Roll two d20, keep highest one
- • 3d6!: Exploding 6-sided dice
Special Rules
- • Advantage: Roll twice, take highest
- • Disadvantage: Roll twice, take lowest
- • Exploding: Reroll and add on max value
- • Critical: Usually on natural 20
- • Target Number: Success on X or higher
- • Dice Pool: Count successes in multiple dice
Common Uses
- • Role-playing games (D&D, Pathfinder)
- • Board games and tabletop games
- • Educational activities
- • Random decision making
- • Probability demonstrations
- • Randomizing game outcomes
Dice Probability Reference
Single Die Probabilities
- • Any specific number on a d20: 5% chance
- • Rolling a 6 on a d6: 16.7% chance
- • Natural 20 on d20: 5% chance
- • Rolling at least a 15 on d20: 30% chance
- • Rolling max value on any die: 1/sides chance
Multiple Dice Probabilities
- • Rolling 7 on 2d6: 16.7% (highest probability)
- • Rolling 3 or 18 on 3d6: 0.46% (lowest probability)
- • Rolling at least one 6 on 3d6: 70.4% chance
- • Average roll on 4d6 drop lowest: ~12.2
- • Getting all sixes on 3d6: 0.46% chance
Special Roll Probabilities
- • Advantage (2d20, keep highest): +5 average
- • Disadvantage (2d20, keep lowest): -5 average
- • Chance of rolling 20 with advantage: 9.75%
- • Exploding d6 average: ~4.2 (vs 3.5 normal)
- • 4d6 drop lowest ≥ 15: ~40% chance
About Dice and Tabletop Gaming
The Role of Dice in Gaming
Dice have been an integral part of games throughout human history, with evidence of dice dating back thousands of years. They introduce an element of chance and unpredictability that makes games exciting and replayable.
In modern tabletop role-playing games (RPGs), dice are used to resolve actions, determine outcomes, and add an element of risk and reward to player decisions. Different systems use different combinations of dice to create various probability distributions.
Types of Polyhedral Dice
The standard set of polyhedral dice includes seven different shapes: d4, d6, d8, d10, d12, d20, and percentile dice (d100, usually represented by two d10s). Each has a different probability distribution and is used for different purposes in games.
Each die is named for the number of faces it has. The d20 is the most iconic die in Dungeons & Dragons, used for attack rolls, saving throws, and ability checks. The d6 is the familiar cube-shaped die used in countless games throughout history.
Dice Roller Features
Standard Dice Set
Roll all standard polyhedral dice used in RPGs: d4, d6, d8, d10, d12, d20, and d100, with options for multiple dice at once.
Advanced Options
Advantage/disadvantage rolls, exploding dice, keep/drop highest/lowest, target numbers, and more for specialized game systems.
Custom Dice
Create dice with any number of sides for specialized games or unique probability distributions not covered by standard dice.
Roll History
Track your roll history for record keeping, game sessions, and analyzing your luck over time.
Game Presets
Quick access to common dice configurations for popular RPGs like D&D, Pathfinder, and more.
True Randomness
Uses cryptographically secure random number generation for fair and truly unpredictable results every time.
Common Dice Notations
| Notation | Meaning | Example | Used In |
|---|---|---|---|
| XdY | Roll X dice with Y sides each | 3d6 = roll three 6-sided dice | Almost all RPGs |
| XdY+Z | Roll X dice with Y sides, add Z | 1d20+5 = roll one d20, add 5 | D&D, Pathfinder |
| XdYkZ | Roll X dice with Y sides, keep highest Z | 4d6k3 = roll four d6, keep highest 3 | D&D character creation |
| XdY! | Exploding dice (reroll and add on max value) | 3d6! = three d6 with explosions | Savage Worlds, some indie RPGs |
| XdY>Z | Count successes for rolls greater than or equal to Z | 7d107 = seven d10, success on 7+ | World of Darkness, Shadowrun |
Using Dice in Different Games
Dungeons & Dragons
- • d20: Attack rolls, ability checks, saving throws
- • d4, d6, d8, d10, d12: Damage rolls (weapon-dependent)
- • d100 (2d10): Random tables, percentile checks
- • 4d6 drop lowest: Character ability score generation
- • Advantage/Disadvantage: Roll 2d20, take highest/lowest
Other RPG Systems
- • Savage Worlds: Trait dice (d4-d12), exploding dice, Wild Die
- • World of Darkness: Dice pools of d10s, success on 8+
- • GURPS: 3d6 roll-under system
- • Fate: Specialized Fate dice (d6 with +1, 0, -1)
- • Shadowrun: Dice pools of d6s, success on 5+
Understanding Probability in Dice
Uniform vs. Bell Curve Distribution
Single Die (Uniform Distribution):
When rolling a single die, all possible results are equally likely. For example, on a d20, you have a 5% chance of rolling any given number.
This creates a "flat" probability distribution, where extreme results are just as common as middle results.
Multiple Dice (Bell Curve):
When rolling multiple dice and adding them (like 3d6), results cluster around the average, with extreme results becoming less likely.
For 3d6, the most common result is 10-11, while 3 and 18 are the least likely outcomes, creating a "bell curve" distribution.
Making the Most of the Dice Roller
Pro Tips
Save time with presets: Use the preset buttons for common rolls in your favorite games.
Use advanced options: Advantage/disadvantage, exploding dice, and drop/keep options simulate complex game mechanics.
Track your luck: Use the history tab to see how your rolls have been trending over time.
Share your results: Use the copy button to share important roll results with your gaming group.
Create custom dice: For unique game systems or custom rules, create dice with any number of sides.
Experiment with probability: Test different dice combinations to understand their probability distributions.
Roll With Confidence
Our dice roller uses cryptographically secure random number generation for fair and truly random results. All rolls are performed locally in your browser, ensuring privacy and speed. While digital dice can never fully replace the tactile experience of physical dice, our roller provides reliable, convenient, and feature-rich dice rolling for all your tabletop gaming needs.