Dice Roller
Roll one or many dice online: d4, d6, d8, d10, d12, d20, d100. Supports notation such as 2d6+3, advantage, keep highest, exploding dice and shows the odds.
Runs in your browser. Nothing you add is uploaded.
What the Dice Roller does
Whether you are playing a board game, running a role-playing session or teaching probability, a dice roller needs to be fair and to understand the notation players actually use. This one rolls any standard die from d4 to d100 and reads full dice notation: 2d6+3, 4d6kh3 to keep the highest three, 2d20kh1 for advantage, exploding dice and Fate dice. It shows every die, strikes through dropped ones, reports the range and average, and charts the exact odds of each total.
How to roll dice online
- On “Pick dice”, choose the die type, how many dice to roll and an optional modifier, then press Roll.
- For anything more complex, switch to “Dice notation” and type it, such as 2d6+3 or 4d6kh3. Presets cover advantage, disadvantage, ability scores and more.
- Read the result: the total, each die, dropped dice struck through, and the range and average for the roll.
- For ordinary rolls of several dice, read the chart to see how likely each total is. The dark bar is the one you rolled.
- Earlier rolls are listed under Recent rolls.
The Dice Roller runs entirely in your browser — nothing you enter is uploaded, stored, or logged.
When to use it
Role-playing games
Roll attack and damage dice, ability scores (4d6 drop lowest), advantage and disadvantage and percentile checks without hunting for physical dice.
Board and classroom games
Roll a d6 for Monopoly or Ludo, or use a d10 or d12 for classroom activities, from any device with a browser.
Learning probability
Roll 2d6 many times and compare with the chart: seven is six times as likely as two or twelve, which is why it dominates many board games.
Good to know
- The middle totals of several dice are far more likely than the extremes: sum dice follow a bell-shaped curve.
- 2d20kh1 (advantage) raises a d20 roll's success chance by up to 25 percentage points, most for targets near 11.
- In exploding notation (1d6!) a maximum roll adds another die, so there is no upper limit.
- Modifiers apply once per roll, not to each die.
- You can roll up to 200 dice at once; results stay readable up to about 40.