Free Dice Roller
Roll 1-10 dice with D4, D6, D8, D10, D12 and D20 options. Animated results with roll history, totals and statistics.
Roll History
How a Dice Roll Works
Each die produces a uniformly random result between 1 and the number of sides. A standard D6 has equal probability (16.67%) of landing on any face from 1 to 6. When rolling multiple dice, the total follows a bell curve — middle values are more likely than extremes. For example, rolling 2D6 produces 7 most often (6 out of 36 combinations) while 2 and 12 each occur only once in 36 rolls.
Dice Types Explained
Dice Notation (XdY)
Dice notation follows the format XdY where X is the number of dice and Y is the number of sides. 2d6 means roll two six-sided dice and add the results. 3d8+5 means roll three eight-sided dice, add them together, then add 5. This notation is standard in Dungeons & Dragons, Pathfinder, and most tabletop RPGs. Some systems also use "d%" (percentile) which means rolling two D10s to get a result from 1 to 100.
Probability and Multiple Dice
A single die has a flat probability distribution — each face is equally likely. Multiple dice create a bell curve. With 2D6, the probability of rolling 7 is 16.67% (6/36) while rolling 2 or 12 is just 2.78% (1/36). This bell curve effect matters in game design: systems using 2D6 produce more predictable, average results while D20 systems have more dramatic swings.
2D6 probability distribution
- 2 or 12: 2.78% (1 combination each)
- 3 or 11: 5.56% (2 combinations each)
- 4 or 10: 8.33% (3 combinations each)
- 5 or 9: 11.11% (4 combinations each)
- 6 or 8: 13.89% (5 combinations each)
- 7: 16.67% (6 combinations)
History of Dice
Dice are among the oldest gaming tools in human history. The earliest known dice — made from animal ankle bones — date back over 5,000 years to ancient Mesopotamia. Six-sided cubic dice appeared in ancient Egypt around 2000 BCE. The Romans were prolific dice players. Modern precision casino dice are manufactured to a tolerance of 0.0005 inches to ensure fairness. Twenty-sided dice (D20s) date to ancient Rome and Egypt but became iconic through Dungeons & Dragons, first published in 1974.
Dice in Popular Games
- Monopoly: 2D6 — doubles let you go again; three doubles sends you to jail
- Yahtzee: 5D6 — roll combinations for scoring categories
- Craps: 2D6 — casino game based on totals (7 and 11 win on first roll)
- Dungeons & Dragons: Full set of D4, D6, D8, D10, D12, D20 — the D20 drives most gameplay
- Risk: Attacker rolls up to 3D6, defender up to 2D6 — highest dice compared
- Backgammon: 2D6 — one of the oldest known board games (3000 BCE)
Fair Dice vs Loaded Dice
A fair die gives each face equal probability. Casino dice are transparent so you can verify nothing is hidden inside. Loaded dice have altered weight distribution to favour certain faces. In digital dice, fairness depends on the random number generator. This roller uses JavaScript's Math.random() which is pseudorandom — perfectly fair for all gaming and decision-making purposes.
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Frequently Asked Questions
It uses JavaScript's Math.random() which is pseudorandom — perfectly fair for games, D&D, and everyday decisions.
D4 (4-sided), D6 (standard), D8, D10, D12, and D20. Roll 1 to 10 dice at once.
The D20 is the primary die in Dungeons & Dragons — used for attack rolls, ability checks, and saving throws.
The average is 7. It's also the most common result (6 out of 36 possible combinations).
Roll 3 eight-sided dice and add the results. Format: [number of dice]D[sides per die].
Absolutely. Select the dice type and number you need, roll, and the total is calculated automatically.
