Single die
Roll a d6
A 6-sided die, rolled in your browser. Every face has an equal 16.7% chance, which works out to 1 in 6.
The odds on a d6
A single die is flat: no total is more likely than any other. The curve only appears once you roll more than one, which is what the 2d6 page is for.
- Lowest
- 1
- Highest
- 6
- Average
- 3.50
- Each face
- 16.7%
- Odds
- 1 in 6
Every bar the same height. That flatness is the whole point of a single die: 16.7% per face, no favourites.
What a d6 is for
The workhorse. Shortsword damage, sneak attack stacks, fireballs, and every board game in the cupboard.
Why the d6 is the one everyone owns
The cube is the only Platonic solid most people meet outside a game shop, which is why it ended up as the default randomiser for basically every board game printed in the last century. It is cheap to mould, it rolls predictably, and the pips are readable from across a table.
For probability that matters more than it sounds, because the d6 is where almost everyone first sees a distribution change shape. One d6 is flat. Two is a triangle peaking at 7. Three is close enough to a bell curve that statisticians used to fake normal distributions by rolling handfuls of them and adding up. The 2d6 and 3d6 pages show that progression with the actual figures.
It is also the die that gets rolled in quantity. Fireball is eight of them, a rogue's sneak attack climbs by one every two levels, and falling damage is one per ten feet. Those pools are where the curve stops being a curiosity and starts telling you how much damage to actually expect.
Hitting a target number
What a flat d6 beats, and how much two-dice advantage moves it.
| Need | Flat | Advantage | Disadvantage |
|---|---|---|---|
| 2+ | 83.3% | 97.2% | 69.4% |
| 3+ | 66.7% | 88.9% | 44.4% |
| 4+ | 50.0% | 75.0% | 25.0% |
| 5+ | 33.3% | 55.6% | 11.1% |
| 6+ | 16.7% | 30.6% | 2.78% |
How to use this roller
Tap the die or press the roll button. To roll several at once, change How many, and the chart above redraws to the distribution you are actually rolling. To add a bonus, put it in Modifier: entering 3 turns a d6 into 1d6+3. Negative numbers work for penalties. The keyboard shortcut is R. After a roll, Copy link gives you a URL that shows exactly that result to whoever opens it.
Nothing is stored on a server and no account is needed. The page works offline once loaded, which matters if the venue has poor signal.
Common questions about the d6
What are the odds of rolling a 6 on a d6?
The odds of rolling a 6 on a d6 are exactly 16.7%, or 1 in 6. Every face on a fair d6 is equally likely, so a 6 is no rarer than any other number.
Why do opposite sides of a die add up to 7?
Opposite faces on a standard d6 add to 7, pairing 1 with 6, 2 with 5 and 3 with 4. It is a convention that goes back to ancient dice, and it has a practical side: on a die with drilled pips it spreads the removed material evenly, so no side is noticeably lighter. It also means the face on the table is always 7 minus the face on top.
What are the odds of rolling at least one 6 in four rolls?
The chance of at least one 6 in four rolls of a d6 is 51.77%, just better than even. In the 1650s a gambler, the Chevalier de Méré, made money betting on it, then lost betting on at least one double six in 24 rolls of two dice, which comes in at only 49.14%. His question reached Pascal and Fermat, and their letters about it are usually counted as the start of probability theory.
Is this d6 roller actually random?
Yes, this d6 roller uses cryptographic randomness. Every roll comes from the Web Crypto API rather than Math.random, with rejection sampling to discard values that would skew the result. A plain modulo of a random number is biased when the range does not divide evenly, which for a d6 would quietly favour the low faces.