Dice roller
Lost the dice? Roll these.
Pick how many dice and what kind, then tap roll. Every result comes from your browser's secure random generator, so each face is exactly as likely as the next.
Space bar rolls too.
Free tool from Pocket Puzzle Arcade
How the rolls are made
Each die asks your browser's cryptographic random number generator for a number and maps it evenly onto the faces, discarding any value that would tilt the odds. The tumbling is only for show. A D6 lands on each face one time in six; a D20 one time in twenty.
Why seven comes up so often with two dice
One die is flat: every face is equally likely. Add a second and the totals bunch in the middle, because there are more ways to make them.
| Total | Ways to roll it | Chance |
|---|---|---|
| 2 or 12 | 1 each | 2.8% each |
| 3 or 11 | 2 each | 5.6% each |
| 4 or 10 | 3 each | 8.3% each |
| 5 or 9 | 4 each | 11.1% each |
| 6 or 8 | 5 each | 13.9% each |
| 7 | 6 | 16.7% |
That is 36 combinations in all. Roll two dice a few dozen times above and watch the average total settle near 7.
The expected average
The average of one die is half of (sides + 1): 3.5 for a D6, 10.5 for a D20. For several dice, multiply by the number of dice. Three D6 average 10.5; two D20 average 21. The "expected average" box shows the figure for your current setup so you can compare your luck with the maths.
Which dice for which game
- Two D6: most board games, from property trading to settling islands.
- Five D6: poker-dice games where you keep and re-roll.
- D20 and friends: tabletop role-playing, where a D20 decides success and the others set damage.
Questions people ask
Is an online dice roller fair?
This one uses the browser's cryptographic random number generator and maps it evenly onto the faces, so every face has the same chance on every roll.
What is the most common roll with two dice?
Seven. Six of the 36 possible combinations add up to 7, a chance of 16.7%, more than any other total.
What is the average roll of a D20?
10.5. For any fair die the average is half of the number of sides plus one.
Like numbers that add up? Try the bridges.
Number Puzzles: Sumbriska is a logic game for iPhone and iPad. Tap a bridge to flip it and watch the totals on both islands change until every island matches its target. Its listing describes six themed regions, a timed run and an endless mode.
Get Sumbriska on the App StoreFree download with an optional in-app subscription; iOS/iPadOS 18 or later. Check the App Store for what the free regions include and current prices.
Honest Little Apps publishes both Sumbriska and this page. This is a separate browser tool and does not sync with the app. App details checked November 10, 2026.
On a computer? Open it on your iPhone
