About this Dice Roller
Lost your dice? Need to roll 5d6 for a fireball damage roll? This virtual dice roller generates pseudo-random results for all standard tabletop gaming dice. It's perfect for Dungeons & Dragons, board games, or settling bets.
Who this calculator is for
- Tabletop players who need a quick digital die roll during a game.
- Anyone simulating repeated integer outcomes for a simple math or probability exercise.
- Users who want a fast randomizer without carrying physical dice.
When to use it
- Roll a single die such as a d20 for a game action or check.
- Roll multiple dice and add the results for damage or scoring.
- Generate repeated random integer outcomes to illustrate probability ideas.
How to use this calculator
- Select the Type of die (e.g., D6 for a cube, D20 for an icosahedron).
- Enter the Number of Dice to roll at once.
- Click Generate.
- View the Total Sum and the Individual Rolls.
Key assumptions
- The number of dice must be a positive whole number.
- This tool simulates standard fair dice with equally likely sides.
- Results come from the browser's pseudo-random generator, which is suitable for casual use but not for audited or cryptographic randomness.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
The calculator uses a pseudo-random number generator (PRNG) to produce an integer between 1 and the number of sides for each die.
Formula per die: `Math.floor(Math.random() * sides) + 1`
Inputs explained
Type
The number of sides on the die. Common types include D6 (standard), D20 (RPGs), and D100 (percentage).
Number of Dice
How many dice to roll simultaneously. The results are summed up automatically.
Understanding your results
The Total Sum is useful for damage rolls or skill checks. The Individual Rolls allow you to check for critical hits (naturals) or specific combinations.
Example scenarios
Monopoly
Roll 2 D6. Result: 4, 3. Total: 7.
D&D Attack
Roll 1 D20. Result: 19. Critical Hit!
Key Features
- Supports 7 die types
- Multi-dice summing
- Instant roll results
Tips & Best Practices
- For percentile rolls (1-100), select D100.
- Use this tool to generate random numbers from 1 to X by selecting a custom die size (conceptually).
Glossary of Terms
- D20
- A 20-sided die, iconic in role-playing games like Dungeons & Dragons.
- PRNG
- Pseudo-Random Number Generator. An algorithm for generating a sequence of numbers whose properties approximate the properties of sequences of random numbers.