Dice roller

How to use the dice roller

Type a roll in the box and press Roll. The letter d stands for dice and the number after it is how many sides, so 2d6 is two six-sided dice and d20 is one twenty-sided die. Add or take away a number at the end: 2d6+3, 3d8-1. For a quick roll, set how many dice and any number to add, then tap d4, d6, d8, d10, d12, d20 or d100.

Your last 20 rolls are listed under the result. The list stays on this device and nobody else sees it.

Keeping, dropping, rerolling and exploding

• Drop or keep. 4d6 drop lowest (or 4d6kh3, keep highest 3) rolls four dice and adds the best three. 2d20kh1 rolls two and keeps the higher, which many games call advantage; 2d20kl1 keeps the lower.
• Reroll. 3d6r1, or 3d6 reroll 1s, rolls any 1 again, once. The second roll stands, even if it is another 1.
• Exploding dice. d6! means a 6 is rolled again and added on, and again if that is a 6 too.
• Percentile. d100 or d% gives 1 to 100. d3 works too.

How to read the result

The big number is the total. Each die is shown on its own. A dropped die has a dashed edge and a line through it, a rerolled one says what it was before ("was 1"), and an exploded one shows each roll that went into it, like 6+6+2. Under that is the lowest and highest the roll can make and its average, so you can tell a good roll from a poor one.

Are the rolls fair?

Yes. Each die uses your browser's secure random numbers, the same kind used to make passwords, not a pattern. A common shortcut makes low numbers a tiny bit more likely; we avoid it by throwing away the few random numbers that would tip the balance and drawing again, so every face has exactly the same chance. Nothing is sent to us.

Want the odds instead?

The dice probability calculator works out the exact chance of any total or any number of successes, and the game clock keeps long games moving. If the dice are for a new campaign, the fantasy name generator helps with characters and places, and our guide to painting miniatures covers the figures themselves.