How to use it
- Choose the die: d4, d6, d8, d10, d12, d20 or d100.
- Set the number of dice (1–20).
- Click Roll.
- Read each die and the total.
Dice types
| Die | Sides | Common use |
|---|---|---|
| d4 | 1–4 | RPG damage |
| d6 | 1–6 | Board games, Yahtzee, Monopoly |
| d8 | 1–8 | RPG weapons |
| d10 | 1–10 | RPGs, percentile rolls |
| d12 | 1–12 | RPG damage |
| d20 | 1–20 | Attack and skill checks in D&D |
| d100 | 1–100 | Percent rolls |
RPG notation describes rolls as number of dice + d + sides: 2d6 means two six-sided dice, 3d8 means three eight-sided dice. The roll history uses the same notation, for example "2d6: 4+5 = 9".
Is it fair?
Each die is rolled with your browser's cryptographic random generator, so every face has the same chance (1 in 6 on a d6, 1 in 20 on a d20). The rolling animation is just for show; the final values are decided before it starts. Previous rolls don't affect the next one: after three 6s in a row, a 6 is still exactly a 1 in 6 chance.
Totals and probabilities
With more than one die, the tool adds them up. The note under the dice shows the possible range and the average: 2d6 runs from 2 to 12 with an average of 7, and 3d6 from 3 to 18 with an average of 10.5.
Totals aren't equally likely. With two six-sided dice there are 36 combinations:
| Total | Ways | Chance |
|---|---|---|
| 2 or 12 | 1 | 2.8% |
| 3 or 11 | 2 | 5.6% |
| 4 or 10 | 3 | 8.3% |
| 5 or 9 | 4 | 11.1% |
| 6 or 8 | 5 | 13.9% |
| 7 | 6 | 16.7% |
That's why 7 is the key number in craps and the most common roll in Settlers of Catan.
Uses beyond games
- Math class: roll 2d6 a hundred times and compare the results with the table above.
- Decisions: assign options to numbers and let a die choose.
- Fitness and drills: roll for the number of reps or the next exercise.
- Lost dice: if a board game is missing its dice, this works on any phone.
For a single random number in any range, the random number generator is more flexible; for heads or tails, use flip a coin.
Good to know
Six-sided dice are shown with dot faces; other dice show the number. If your device is set to reduce motion, results appear without the rolling animation. Up to 20 dice can be rolled at once, and the last 10 rolls are listed so you can check what happened. Nothing is saved or uploaded.
Frequently asked questions
How do I roll a d20?
Click d20, set the number of dice to 1 and press Roll.
Can I roll several dice at once?
Yes, up to 20 dice of the same type. The tool shows each die and the total.
What's the most likely total with two dice?
7, with a 6 in 36 (16.7%) chance.
Is the virtual dice roller fair?
Yes. Each face has the same chance, using your browser's cryptographic random generator.
What does 3d6 mean?
Roll three six-sided dice and add them up. The total ranges from 3 to 18.
Last updated: November 12, 2026