How this dice roller works

Each roll uses your browser’s random number generator to produce a uniformly distributed result between 1 and the number of sides you choose, for as many dice as you request, then sums the results.

How to use this online dice roller

1. Enter how many dice you want to roll (up to 20).
2. Choose the number of sides — d4, d6, d8, d10, d12, d20, or d100.
3. Click Roll to see each result plus the total (and average, for multiple dice).

Which dice do different games use?

Tabletop role-playing games like Dungeons & Dragons commonly use the full polyhedral set — d4, d6, d8, d10, d12, and d20 — for everything from damage rolls to skill checks, while board games and simple decision-making usually stick to a standard d6. A d100 (or „percentile die“) is often used for rolling a straightforward 1-100 result, such as a percentage chance in a game.

Is a virtual dice roller fair?

This tool uses your browser’s built-in random number generator, which produces a statistically uniform result across all sides of the chosen die — every face has an equal chance of coming up, just like a well-made physical die. For casual games, decisions, and classroom use, this is more than sufficient; it also removes any concern about a physical die being worn unevenly or landing awkwardly.

Tips for using a virtual dice roller

Rolling multiple dice at once (up to 20) is useful for games that ask you to roll several dice and sum the total, such as rolling 4d6 for a character stat. The running total and average shown after each roll can help you quickly sanity-check results across a long gaming session.

Expert insight: how „random“ gets defined at the highest level

The U.S. National Institute of Standards and Technology (NIST) operates a public randomness beacon built on quantum mechanics for uses like jury selection and public lotteries, where randomness has to be provably fair to a very high standard. Casual games and decisions don’t need anywhere near that level of rigor — your browser’s built-in random number function is more than sufficient for rolling dice — but it’s a good illustration of how seriously „true randomness“ is treated when the stakes are high.

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