Dice Roller
Roll virtual dice for D&D, tabletop RPGs, and games. Supports D4, D6, D8, D10, D12, D20, and custom dice with modifiers.
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Common Dice Rolls
D&D Ability Check
1d20 + modifier — roll for skills, saves, and attacks
D&D Damage
2d6, 1d8, 1d12 — common weapon damage dice
Percentile
1d100 — roll for random tables and chance
Fireball (D&D)
8d6 — classic area-of-effect spell damage
About Dice & Probability
Dice have been used for games and divination for thousands of years. The oldest known dice date back to around 3000 BCE in Mesopotamia. Modern polyhedral dice used in tabletop RPGs like Dungeons & Dragons include the standard set of D4, D6, D8, D10, D12, and D20. (Source: Wikipedia — Dice)
Each die roll is an independent event governed by probability theory. The expected value of a fair D6 roll is 3.5, and the probability of rolling any specific number is 1/n where n is the number of sides. When rolling multiple dice, the distribution of sums approaches a normal distribution — a key concept in statistics known as the Central Limit Theorem. (Source: Wikipedia — Probability theory)