Dice Roller

How to use the dice roller

1. Type what you want to roll in Dice to roll, for example 2d6, d20+5 or 3d8+1d6+2. The number before the “d” is how many dice, the number after it is how many sides.
2. Or build the roll with the buttons next to Add a die:. Each click on d4, d6, d8, d10, d12, d20 or d100 adds one die of that type, so three clicks on d6 give 3d6. For an unusual die, enter the number of sides in Custom die (sides) and press Add custom die. Reset empties the box.
3. Press Roll (or Enter). The dice tumble in the tray, then the Total, the number of Dice rolled, and the Lowest possible and Highest possible results appear, with a line-by-line Breakdown of every group of dice.
4. For tabletop shortcuts, use Advantage (2d20, keep highest), Disadvantage (2d20, keep lowest) or Ability score (4d6, drop lowest): each one fills in the notation and rolls straight away.
5. Every roll is added to the Roll history. Click a notation in the history to put it back in the box. Copy copies the latest roll as one line of text, ready to paste in a chat.

Untick Animate the dice to get results instantly. If your device is set to reduce motion, the animation is skipped automatically.

Dice notation supported

The notation follows the conventions used by most virtual tabletops and Discord dice bots:

You can combine up to 20 groups and roll up to 1,000 dice per group (5,000 in total), with dice from 2 to 1,000,000 sides. Dropped dice stay visible but faded and struck through, so you can check the result. Extra dice from an explosion are marked with an asterisk; a single group can explode at most 100 times, so the highest possible total is shown as ∞.

In the copied text, dropped dice are written between double tildes (~~1~~), which Discord and many chat apps display as strikethrough.

Are the rolls fair?

Yes. Each die uses your browser’s cryptographic random number generator (the Web Crypto API) with rejection sampling, which removes the small “modulo bias” that simple random code can have. Every face of every die has exactly the same chance, whatever the number of sides. The result is decided the moment you press Roll; the tumbling animation only shows random faces for fun and does not change anything. Nothing is sent to a server: the rolls happen on your device.

Useful examples

• Board games: 2d6 for Monopoly or Catan, 5d6 for Yahtzee.
• Dungeons & Dragons 5e: d20+5 for an attack, 2d6+3 for greatsword damage, 8d6 for a fireball, and six clicks on Ability score (4d6, drop lowest) to create a character.
• Other RPGs: d% for percentile systems, 3d6 for classic stat rolls, 6d10 for dice pools where you count successes in the breakdown.