Dice Roller
Roll any dice type (d4 to d100) with animation. Roll 1-10 dice simultaneously, add modifiers, and see full roll history.
How to use Dice Roller
Roll virtual dice for any tabletop RPG, board game, or probability exercise — supports every standard die type (d4, d6, d8, d10, d12, d20, d100) as well as custom-sided dice. Roll multiple dice simultaneously, add modifiers, keep highest or lowest rolls (advantage/disadvantage), and see the full probability distribution. Results use the Web Crypto API for fair, unbiased rolls.
- Select the die type: d4, d6, d8, d10, d12, d20, d100, or enter a custom number of sides.
- Set how many dice to roll simultaneously (e.g., 3d6 for a D&D ability score).
- Add a modifier (+ or −) to the total if required by your game system.
- Toggle "Advantage" to roll twice and keep the highest, or "Disadvantage" to keep the lowest.
- Click Roll and see the individual die results, total, and roll history.
Your data never leaves your device — 100% private processing.
Standard polyhedral dice and their uses
Tabletop RPGs like Dungeons & Dragons use a set of standard polyhedral dice. The d20 is the core resolution die for attacks and skill checks. The d6 is used for damage and ability score generation (roll 4d6, drop lowest). The d4, d8, d10, d12 determine weapon damage by type — a dagger deals 1d4, a longsword 1d8, a greataxe 1d12. The d100 (or d% using two d10s) handles percentage-based tables. The d10 (0–9 and 00–90) generates percentile results when paired.
| Die | Range | Common use |
|---|---|---|
| d4 | 1–4 | Light weapon damage (dagger, dart) |
| d6 | 1–6 | Ability scores, standard damage |
| d8 | 1–8 | Medium weapon, healing potions |
| d10 | 1–10 | Heavy weapon, percentile tens |
| d12 | 1–12 | Greataxe damage, bardic inspiration |
| d20 | 1–20 | Attack rolls, saving throws, skill checks |
| d100 | 1–100 | Random tables, loot, wild magic |
Advantage and disadvantage mechanics
D&D 5e introduced the advantage/disadvantage system as a streamlined probability modifier. Advantage (roll 2d20, keep highest) shifts the effective average from 10.5 to 13.8. Disadvantage (roll 2d20, keep lowest) drops it to 7.2. This is equivalent to approximately +3.3 or −3.3 to the roll, making it a significant but not overwhelming modifier — more elegant than the older +2/−2 flat bonus system. Multiple sources of advantage or disadvantage don't stack; you roll at most two dice regardless.
Glossary
- Polyhedral dice
- Multi-sided dice with 4, 6, 8, 10, 12, 20, or 100 faces used in tabletop role-playing games.
- Modifier
- A fixed number added to or subtracted from a die roll result, representing character ability bonuses.
- Advantage
- A D&D 5e mechanic where you roll two dice and take the higher result, increasing the probability of success.
- Critical hit
- Rolling a natural 20 on a d20 attack roll, resulting in double damage dice in D&D 5e.
Related reading
Frequently Asked Questions
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Why use Dice Roller?
- Cryptographically random generators for secure use cases
- Fully configurable output — length, charset, quantity
- Download or copy output in one click
- No data logged or stored — 100% private generation
Common use cases
- Generate a strong random password for a new account
- Create test data with realistic-looking names and emails
- Produce random numbers for a classroom lottery
- Generate Lorem Ipsum placeholder text for mockups
- Create unique UUIDs for software development
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