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Dice Roller

Roll any combination of standard polyhedral dice: d4, d6, d8, d10, d12, d20, d100. Add modifiers and roll multiple times.

d10

d12

d20

d100

Modifier

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How to use Dice Roller

Set how many of each die type you want — for example two d6 and one d20.
Add a flat modifier if your roll needs one, such as +3 for an attack bonus.
Click Roll dice to generate every die at once.
Read each die’s individual result plus the combined total with the modifier applied.
Roll again as many times as you need — each roll is fully independent.

Dice roller: fair polyhedral dice for any game

This roller covers the full set of standard tabletop dice — d4, d6, d8, d10, d12, d20, and d100 — and lets you roll any mix of them at once with an optional modifier. Whether you are running a Dungeons & Dragons combat, playing a board game with a missing die, or just need a quick random number with a known range, every face here has an exactly equal chance of coming up.

How a die is rolled

For a die with N sides, the tool reads a secure random integer and folds it evenly into the range 1 to N, so no face is favoured and no previous roll hints at the next. A digital d20 is, statistically, fairer than most physical d20s, which can lean toward certain faces because of tiny imperfections in how they are cast and where the number pips sit.

One die is flat; many dice make a curve

A single die is "uniform" — on a d6 each number from 1 to 6 has the same 1-in-6 chance. The interesting probability appears when you add dice together. Roll two six-sided dice and the totals are no longer flat:

A total of 7 has six combinations (1+6, 2+5, 3+4 and reverses) — the most likely at 16.7%.
A total of 2 or 12 has only one combination each — the least likely at 2.8%.
The 36 possible ordered outcomes form a neat triangle peaking at 7.

Add more dice and that triangle smooths into a bell curve, which is why dice-pool systems feel more "reliable" than a single roll: extreme totals get rarer.

Reading your roll

Each die's result is shown individually so you can apply game rules that care about the raw numbers — a natural 20, a critical hit, or counting how many dice beat a threshold. The total then adds every die plus your modifier. A notation like 3d8+2 means roll three eight-sided dice, sum them, and add 2.

Why polyhedral dice exist

The familiar seven-die set was popularized by early role-playing games to give designers a range of probability shapes. A d4 is harsh and swingy for its size; a d20 gives a wide, flat spread perfect for skill checks; percentile dice (d100, usually rolled as two d10s) let rules express odds to the nearest one percent. Having the whole set means a designer can pick exactly the randomness a mechanic needs.

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Frequently asked questions

Is this safe for D&D?

Yes. Each die is rolled from secure browser randomness, so the faces come up at least as evenly as a well-made physical die. Plenty of DMs still bring real dice for the ritual, but the odds here are clean.

Can I roll exotic dice like d3?

For a d3, roll a d6 and divide the result by two rounding up, or use the random number tool to roll a 1–3 range directly. The same trick works for any non-standard die.

What are the odds on a single d20?

Each face has a flat 1-in-20 chance, or 5%. A natural 20 and a natural 1 are equally likely. There is no bell curve on a single die — that only appears when you sum several dice.

Why do 2d6 totals favour 7?

Because there are more ways to make a middle total. A 7 can be rolled as 1+6, 2+5, 3+4 and their reverses — six combinations out of 36 (about 16.7%), while a 2 or a 12 has just one combination each (about 2.8%). Summing dice creates a triangular, then bell-shaped, distribution.

Are these rolls truly random?

Each roll is independent and drawn from secure browser entropy, so an earlier result never nudges the next face. That is sturdier than the seeded formula many quick browser rollers rely on.

What does the modifier do?

It adds a fixed amount to the sum of all dice after they are rolled. A roll of 2d6+3 means roll two six-sided dice, add their faces, then add 3. The modifier never changes the individual die results, only the total.

Can a roll be forced or called ahead?

No. The face is fixed by secure entropy that ignores the clock, so there is no clever moment to click and no pattern in past rolls to exploit.

Why use digital dice over physical ones?

Digital dice cannot be weighted, chipped, or "set" by a practised thrower, and they handle huge dice pools instantly. They are ideal for online play, large rolls, or settling a fairness dispute.

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