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Dice Roller

Roll any dice notation, with modifiers and statistics.

Calculators Reviews Free · no sign-up

Combine groups with + and −, such as 2d6+1d8+3.

This roll

History

#NotationDiceTotal

Total

—

Press Roll to begin.

Probability

Minimum—
Maximum—
Average—
Chance of target—

This session

Rolls made0
Session average—

—

How this roll compares to the average

Randomness comes from the browser's cryptographic generator rather than Math.random, which is measurably biased over a long session. The probability figures are exact for the notation you entered, computed rather than simulated.

Quick Tool Overview

The Dice Roller handles any standard dice notation — 3d6+2, 1d20, 4d8-1 — showing every individual die alongside the total, with advantage, disadvantage and exploding dice modes and a probability panel.

What it does
Rolls any dice notation with statistics
You give it
Dice notation and a roll mode
You get back
Individual dice, the total and the odds
Best for
Tabletop games when the dice bag is missing
Calculators Free, unlimited use No sign-up Runs in your browser

About the Dice Roller

Roll any combination of dice using standard notation — 3d6+2, 2d20, 1d100 — with every individual die shown alongside the total. Advantage and disadvantage rolls are supported, as is exploding dice, and a running history keeps the last rolls visible.

Randomness comes from the browser's cryptographic random number generator rather than Math.random, which matters more than it sounds: the usual generator is fast but statistically weak, and over a long session its bias is measurable. A statistics panel shows the theoretical minimum, maximum, mean and the probability of hitting or exceeding a target, which is the number that actually matters at a table.

Key features of the Dice Roller

Full dice notation

Multiple groups and modifiers, so 2d6+1d8+3 works as written.

Advantage and disadvantage

Roll twice and take the higher or lower, with both results shown.

Cryptographic randomness

Uses the browser secure generator rather than Math.random, which is measurably biased over a long session.

Probability panel

Minimum, maximum, mean and the chance of beating a target number.

Roll history

The last rolls stay visible, so a disputed result can be checked.

How to use the Dice Roller

  1. 1

    Enter dice notation

    Such as 3d6+2, 1d20 or 4d8-1. Multiple groups can be combined.

  2. 2

    Choose a roll mode

    Normal, advantage, disadvantage or exploding dice.

  3. 3

    Roll

    Every individual die is shown, along with the modifier and total.

  4. 4

    Check the odds

    Minimum, maximum, average and the chance of beating a target number.

Frequently asked questions

Roll three six-sided dice, add the results together, then add two. The first number is how many dice, the second how many sides, and the modifier is applied to the total.

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