Online Dice Roller

Rolls any standard tabletop dice — d4, d6, d8, d10, d12, d20 — or a custom side count, with support for rolling multiples and adding a fixed modifier, the way dice are actually specified at the table.

Reading dice notation

Tabletop games specify rolls as NdS+M — N dice, each with S sides, plus a modifier M. 2d6+3 means roll two six-sided dice, sum them, and add 3; the result ranges from 5 (two 1s plus 3) to 15 (two 6s plus 3). d20 alone (no number before the d) means one twenty-sided die, the standard roll for attack and skill checks in most tabletop RPGs.

Why d20 and d6 are different tools

A single d20 gives a flat distribution — every result from 1 to 20 is equally likely, which is exactly why it's used for pass/fail checks where a small bonus should matter a fixed amount regardless of the roll. Multiple smaller dice (like 3d6) cluster toward the middle — extreme high and low totals are rarer than middling ones — which is why ability scores and damage rolls in many systems use multiple dice instead of one large one, to avoid extreme outcomes on every roll.

Roll history

Every roll — the dice used, the modifier, and the result — stays visible in a running history, which settles the inevitable 'what did I actually roll' dispute a few turns later without anyone needing to have written it down.