Dice Roller
Roll any dice online — D4, D6, D8, D10, D12, D20, D100. Multiple dice, modifiers, history.
Standard Dice Reference
Tabletop RPGs and board games use a standard set of polyhedral dice. The D6 is the classic six-sided cube used in most board games. The D20 is the centerpiece of D&D — used for attack rolls, ability checks, and saving throws. The D100 (percentile) is two D10s rolled together to give 1–100.
This dice roller generates random numbers using the browser's Math.random() function, giving each face an equal (uniform) probability. Math.random() is a pseudorandom generator — fine for games, but not cryptographically secure. Applications that need unpredictable randomness (lotteries, cryptographic keys) should use the Web Crypto API's crypto.getRandomValues() instead; this tool prioritizes speed and simplicity for gaming use.
How to Read Dice Notation (NdS+M)
Tabletop games write dice rolls in shorthand: NdS+M, where N is the number of dice, S is the number of sides, and M is a flat modifier. 3d6 means "roll three six-sided dice and add them together" (range 3–18). 1d20+5 means "roll one twenty-sided die and add 5" (range 6–25). Use the Number of Dice, Die Sides, and Modifier fields above to build any NdS+M combination.
| Notation | Meaning | Range |
|---|---|---|
| 1d6 | One six-sided die | 1–6 |
| 2d6 | Two six-sided dice, summed | 2–12 |
| 1d20+5 | One D20 plus a +5 modifier | 6–25 |
| 2d10 | Two D10s, summed (percentile uses this) | 2–20 |
| 4d6 drop lowest | Common D&D ability-score method: roll 4d6, discard the lowest die | 3–18 |
Frequently Asked Questions
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