Online Dice Roller: D4, D6, D8, D10, D12, D20, D100
Free virtual dice for D&D, Pathfinder, and all tabletop RPGs. Cryptographically random results.
Roll History
The Complete Guide to Online Dice Rolling for Tabletop RPGs
Whether you are running a Dungeons & Dragons campaign over Discord, playing Pathfinder at a friend's kitchen table, or trying out a new indie RPG system, a reliable dice roller is essential. Our free online dice roller generates cryptographically random results for all standard polyhedral dice used in tabletop role-playing games, board games, and educational activities.
Why Use a Virtual Dice Roller?
Physical dice are part of the TTRPG tradition, but virtual dice rollers offer practical advantages that make them indispensable for modern gaming:
- True randomness -- Our roller uses the Web Crypto API, producing more statistically uniform results than physical dice, which can develop manufacturing imperfections.
- Speed -- Roll 8d6 for fireball damage instantly instead of counting individual dice on a table.
- History tracking -- Every roll is logged with timestamp and result, providing transparency for the entire table.
- Accessibility -- Works on any device with a web browser. No dice to lose between couch cushions.
- Silence -- Roll at 2 AM without waking anyone up. Virtual dice do not clatter across hard surfaces.
Understanding Polyhedral Dice
Tabletop RPGs use a set of seven polyhedral dice, each named for the number of faces it has. Here is a breakdown of each die and its common uses:
| Die | Shape | Common Uses in D&D 5e |
|---|---|---|
| D4 | Tetrahedron (4 triangular faces) | Dagger damage, Magic Missile, healing potions |
| D6 | Cube (6 square faces) | Ability score generation, Fireball, Sneak Attack |
| D8 | Octahedron (8 triangular faces) | Longsword damage, Cure Wounds, Hit Dice |
| D10 | Pentagonal trapezohedron | Heavy crossbow, Firebolt cantrip, percentile rolls |
| D12 | Dodecahedron (12 pentagonal faces) | Greataxe damage, Barbarian Hit Dice |
| D20 | Icosahedron (20 triangular faces) | Attack rolls, saving throws, ability checks |
| D100 | Percentile (two D10s) | Wild Magic table, treasure tables, random encounters |
How to Roll Stats: The 4d6 Drop Lowest Method
The most popular method for generating D&D 5e ability scores is the 4d6 drop lowest method. Here is how it works:
- Roll four six-sided dice (4d6).
- Remove the single lowest result.
- Sum the remaining three dice to get one ability score (range: 3-18, average: 12.24).
- Repeat six times for all six ability scores (Strength, Dexterity, Constitution, Intelligence, Wisdom, Charisma).
- Assign scores to abilities as desired.
Our 4d6 Drop Lowest button automates this entire process, generating all six ability scores in one click. The dropped die is shown in the history for full transparency.
Dice Notation Explained
Tabletop RPGs use a standard notation for dice rolls. The format is XdY+Z, where X is the number of dice, Y is the number of sides, and Z is a modifier. For example:
- 1d20+5 -- Roll one D20, add 5 (attack roll with +5 modifier)
- 2d6+3 -- Roll two D6, sum them, add 3 (greatsword damage with +3 STR)
- 8d6 -- Roll eight D6, sum them (Fireball damage)
- 1d100 -- Roll percentile (Wild Magic Surge table)
- 4d6kh3 -- Roll 4d6, keep highest 3 (stat generation)
Dice Probability and Statistics
Understanding dice probabilities helps players make tactical decisions. Each die has a uniform probability distribution, meaning every face has an equal chance of being rolled:
- D20: Each face has a 5% chance. Rolling a natural 20 (critical hit) happens 1 in 20 rolls.
- 2d6: The sum follows a triangular distribution. The most common result is 7 (16.67% chance), while 2 or 12 each have only a 2.78% chance.
- Advantage (rolling 2d20, take highest): Increases your average from 10.5 to 13.82, a significant boost equivalent to roughly a +3 modifier.
- 4d6 drop lowest: Average result is 12.24, compared to 10.5 for a straight 3d6 roll. This method produces heroic ability scores.
Level Up Your Dice Game
Nothing beats the feel of real dice at the table. The Chessex Pound-O-Dice gives you a full pound of assorted polyhedrals — enough for your whole party.
Chessex Pound-O-Dice on Amazon 7-Piece Dice Set Dice TowerTips for Dungeon Masters
Virtual dice rollers are invaluable tools for DMs running games both online and in person:
- Secret rolls -- Roll perception checks, insight checks, and saving throws behind the scenes without physical screen clatter alerting players.
- Speed combat -- When rolling for multiple enemies, roll all attack dice at once. Select "4" quantity for four goblins attacking simultaneously.
- Random encounters -- Use the D100 for percentile-based encounter tables from the Dungeon Master's Guide.
- Treasure generation -- Roll on treasure hoard tables quickly using D100 and individual treasure dice.
Essential DM Resources
The 2024 Dungeon Master's Guide and Player's Handbook are the foundation of every D&D campaign.
DMG 2024 Player's Handbook 2024Frequently Asked Questions
How does the online dice roller work?
Our dice roller uses a cryptographically secure random number generator (crypto.getRandomValues) to produce truly random results. Select your die type (D4 through D100), choose how many dice to roll, and click Roll. Results appear instantly with animations, and every roll is saved to your session history.
Is this dice roller truly random?
Yes. Unlike simple Math.random() implementations, our roller uses the Web Crypto API (crypto.getRandomValues) which provides cryptographically secure pseudo-random numbers. This produces statistically uniform distributions across all die faces, making it as fair as -- or fairer than -- physical dice, which can have manufacturing imperfections that bias certain results.
What dice types can I roll?
You can roll all standard polyhedral dice used in D&D and tabletop RPGs: D4 (tetrahedron), D6 (cube), D8 (octahedron), D10 (pentagonal trapezohedron), D12 (dodecahedron), D20 (icosahedron), and D100 (percentile). You can also roll multiple dice at once, up to 20 at a time.
Can I roll multiple dice at the same time?
Yes. Use the quantity selector to choose between 1 and 20 dice, then click Roll. The tool shows each individual die result plus the total sum. This is ideal for rolling damage dice (like 8d6 for a fireball spell) or rolling stats using the 4d6 drop lowest method.
What is the 4d6 drop lowest method for D&D stats?
The 4d6 drop lowest method is the standard way to generate D&D 5e ability scores. Roll four D6 dice, remove the lowest result, and sum the remaining three. Repeat six times for all six ability scores. Our roller includes a dedicated button for this method that automatically calculates all six scores at once.
Can I use this dice roller for online D&D sessions?
Absolutely. This dice roller works in any web browser on desktop, tablet, or phone. It is perfect for virtual tabletop sessions over Discord, Zoom, or Google Meet. The roll history provides a transparent log that all players can reference, and instant results keep gameplay moving without delays.