How to Roll Dice Online Free — D6, D20 & More
Why Use an Online Dice Roller?
Virtual dice are perfect when you don't have physical dice handy, when you need dice types that don't commonly come in physical sets (like a d3 or d100), or when playing tabletop games remotely with friends over video call. They are also useful for board games, educational probability exercises, and settling disputes fairly.
Free Online Dice Roller
Roll d4, d6, d8, d10, d12, d20, or any custom-sided dice. Roll multiple dice at once with animated results.
Roll Dice Free →Standard Dice Types
- d4 — 4-sided tetrahedron. Used for small weapon damage in D&D (daggers, darts).
- d6 — Standard 6-sided cube. Used in board games, Yahtzee, Monopoly, risk.
- d8 — 8-sided octahedron. Used for longsword damage and spell slots in D&D.
- d10 — 10-sided die (faces 0–9 or 1–10). Used for percentile rolls with two d10s.
- d12 — 12-sided dodecahedron. Used for greataxe damage, calendar months, clock hours.
- d20 — 20-sided icosahedron. The iconic D&D die for attack rolls, ability checks, saving throws.
Dice Notation for D&D and Tabletop RPGs
Standard dice notation: NdX+M where N is the number of dice, X is the die type, and M is a modifier. Examples: "2d6+3" means roll two 6-sided dice and add 3; "1d20" means roll one 20-sided die. Online dice rollers that accept notation strings can handle entire D&D combat sequences.
Probability of Dice Rolls
Each face of a fair die has an equal probability of 1/N (where N is the number of sides). The probability of rolling a 6 on a d6 is 1/6 ≈ 16.7%. When rolling multiple dice, the probabilities combine — two d6s have a 1/36 chance of rolling snake eyes (both 1s), and the most common sum is 7 (6 out of 36 combinations).