About the Dice Roller
A fair dice roller for when the physical dice are missing. Choose the die type, from a four-sided d4 up to a percentile d100, and how many to roll, and the tool reports every result and their sum. It uses the browser's secure random source, so each face is equally likely, which is more than can be said for a chipped plastic die.
Rolling several dice does not give a flat spread, and that catches people out when they design a game or a random table. Each die on its own is uniform, but 2d6 peaks hard at seven, because six of the thirty-six combinations add up to it, while only one gives two and one gives twelve. A single d12 covers almost the same range with every value equally likely. Swapping 2d6 for 1d12 therefore changes the feel of a game completely, which is why the individual results are listed here as well as the total.
It suits tabletop RPGs like Dungeons and Dragons, board games whose dice have gone missing, and classroom probability exercises where you want a hundred rolls in a second rather than an afternoon. Roll 3d6 six times for a character sheet, or a d100 against a percentage chance. For a plain number in any range, the Random Number Generator is more flexible; for a yes or no, the Coin Flip; to choose from a written list of outcomes, the Random Picker.
How to use
- Choose the die type and how many dice.
- Press Roll.
- Read each result and the total.
Common questions
- Are the rolls fair?
- Yes. Each face is equally likely, using the browser's cryptographic random source.
- Can I roll for advantage (2d20)?
- Roll two d20 and take the higher result from the list.
- What is a d100?
- A percentile die giving a number from 1 to 100.