Dice
roller
Lost the dice, or need ones nobody can palm? Roll up to 20 dice of any standard size — d4 through d100 — with every individual result shown and honestly fair randomness underneath.
Fair dice, mathematically
Each die here is a cryptographically random draw with every face exactly equally likely — rejection sampling removes the subtle bias cheap generators carry. A physical die can be shaved or loaded; this one can't.
Why 7 rules two dice
With 2d6 there are 36 equally likely pairs but only some sums: six ways make 7, one way makes 2 or 12. That pyramid of probabilities — 7 six times likelier than snake eyes — is the engine of most classic dice games, and rolling here follows it exactly over time.
The tabletop set
The d4–d20 lineup is the standard polyhedral set from tabletop role-playing games; the d20 decides most actions, while d100 (percentile) handles rare-event tables. For a single yes/no, the coin flip is the two-sided die; for arbitrary ranges beyond dice shapes, the random number generator takes any bounds.
Dice roller FAQ
This one is — each roll uses the browser's cryptographic random source with rejection sampling, making every face exactly equally likely. Arguably fairer than physical dice, which can be imperfect or manipulated.
One to twenty dice of any standard polyhedral size: d4, d6, d8, d10, d12, d20 and percentile d100 — covering board games, D&D and classroom probability.
For 2d6, exactly 7 — and 7 is also the single most common sum, six times more likely than 2 or 12. In general, n dice with s sides average n×(s+1)÷2.
No — rolls are generated locally in your browser, never transmitted, and there is no seed or history to replay. Each press is an independent fresh roll.