Answer: Pick your dice and count above — cryptographically random rolls are thrown instantly with totals, right in your browser.
Roll virtual dice online.
This dice roller simulates rolling dice of the standard role-playing shapes — d4, d6, d8, d10, d12, d20, and d100 — and reports each individual result plus the total. You choose how many dice and how many sides, and each roll is generated independently with every face equally likely, exactly as a fair physical die would behave.
Rolling online is faster than hunting through a bag of dice, and it removes any doubt about biased or chipped physical dice. Because each result is produced by an independent random draw, rolling 4d6 here is statistically the same as throwing four fair six-sided dice on a table: every combination of faces is equally likely on every roll.
The seven dice in a standard polyhedral set trace back to the origins of Dungeons & Dragons in 1974, which borrowed the d20 mechanic from earlier wargames. Today the same set serves D&D, Pathfinder, and countless other systems, and the notation used to describe rolls — 3d6 means roll three six-sided dice and add them — has become a shared language across the hobby.
The table below lists each die, its shape, and where it typically appears in play. The d100 is usually rolled as two d10s (tens and units) rather than as an actual hundred-sided solid, because a fair 100-sided die is physically awkward to manufacture.
On a single fair die, every face has an equal chance: 1 in 6 on a d6 (about 16.7%), 1 in 20 on a d20 (5%). The interesting math appears when you add multiple dice. 2d6 produces a bell-shaped distribution — a total of 7 is the most likely outcome with 6 of the 36 possible combinations, while a total of 2 or 12 each has only a 1-in-36 chance.
This is why game designers specify 3d6 instead of 1d18 for ability scores: summed dice cluster near the middle, so extreme results are rare, while a single large die keeps every value equally likely. Knowing which distribution a rule invokes tells you how swingy the outcome will be. The classic D&D 'advantage' mechanic — roll 2d20 and keep the higher — raises the chance of rolling at least a 20 from 5% to nearly 10%, and pushes the whole distribution upward.
| Die | Shape | Common uses |
|---|---|---|
| d4 | Tetrahedron (4 faces) | Small weapons damage, hp at level 1 in older editions |
| d6 | Cube (6 faces) | Standard dice games, ability scores (3d6), greatsword damage |
| d8 | Octahedron (8 faces) | Longsword damage, hit points per level (average classes) |
| d10 | Pentagonal trapezohedron (10 faces) | Percentile rolls in pairs, damage for medium weapons |
| d12 | Dodecahedron (12 faces) | Greataxe damage, barbarian hit points |
| d20 | Icosahedron (20 faces) | Attack rolls, saving throws, skill checks in D&D |
| d100 | Two d10s (tens + units) | Percentile checks, random tables |
| 2d6 | Two cubes, summed | Most likely total is 7 (6 of 36 combinations) |
An online roller is handy at the table as a backup when dice go missing under the couch, and essential for play-by-post or chat-based games where everyone needs to see and trust the same result. It is also useful for teaching probability: rolling 100 d6s and tallying the faces gives a hands-on demonstration of how empirical frequencies converge on the theoretical 1-in-6 as sample size grows — the law of large numbers in action.
Because each click generates fresh independent results, there is no memory between rolls: five sixes in a row does not make the next roll less likely to be a six. Believing otherwise is the classic gambler's fallacy. The roller's independence is a feature — it guarantees the same fair odds on every roll, with no wear, no bias, and no dice tower to knock over the miniatures.
Are online dice rolls truly random?
Each roll is generated by your browser's random number generator, which produces a uniform result for the number of faces you choose. For game purposes this is indistinguishable from a fair physical die: every face has an equal chance, and rolls are independent of each other.
What does 4d6 mean?
It is standard dice notation: roll four six-sided dice and add the results. The number before the 'd' is how many dice, the number after is how many sides each die has. 2d20+3 would mean roll two twenty-sided dice, add them, then add 3.
What are the odds of rolling a 20 on a d20?
Exactly 1 in 20, or 5%, on a fair die — the same as any other single face. With D&D-style advantage (roll two, keep the higher), the chance of at least one 20 rises to 39 in 400, or 9.75%.
Why do 3d6 rolls cluster in the middle?
Because summed dice produce a bell-shaped distribution: there are many combinations that total 10 or 11 (27 each out of 216) but only one combination each for 3 and 18. A single d18, by contrast, makes every value from 1 to 18 equally likely, so extremes are far more common.
Can I use this for D&D and Pathfinder?
Yes. The roller covers the full polyhedral set used by D&D 5e, Pathfinder, and most d20 systems — d4 through d20 plus percentile (d100) rolls — with individual results shown so you can apply mechanics like advantage or keeping-the-highest yourself.