RubanTools

Dice Roller

Roll D4, D6, D8, D10, D12 or D20 - single or multiple dice. Instant, fair, and always in your pocket.

Die Type

Number of Dice

1 die

Why Use This Dice Roller

All Standard Dice

D4, D6, D8, D10, D12, D20 - every die from your RPG kit, available in one tap.

Fair & Unbiased

Each roll uses cryptographic randomness - no weighted outcomes, no patterns.

Roll History

See your last 5 rolls at a glance to track results during a game session.

Online Dice Roller - D4 to D20 Virtual Dice

Dice are among humanity's oldest randomisation tools, with cubic astragali (bone dice) found at archaeological sites in the Indus Valley dated to around 2500 BCE. Modern tabletop gaming uses polyhedral dice ranging from the four-sided D4 to the twenty-sided D20. Role-playing games such as Dungeons and Dragons (first published in 1974) popularised the full set: D4, D6, D8, D10, D12, and D20. This online roller replicates all standard dice types using cryptographic randomness, giving statistically fair results every time.

Uses Beyond Gaming

Virtual dice are used in classroom probability lessons for CBSE Class 10 and Class 11 Mathematics (Chapter - Probability), where students need to simulate repeated dice rolls without physical props. Teachers use multi-dice rolls to demonstrate the law of large numbers and expected value. Board game nights, online ludo tournaments, and remote team-building sessions also rely on fair digital randomisers when physical dice are not available.

How to Roll Multiple Dice

Select your dice type, set the count (up to 10 at once), and press Roll. The tool displays each individual die result and the grand total - essential for games where sums matter, such as rolling 2D6 for Catan or 4D6-drop-lowest for D&D character stats. Results are generated client-side using the Web Crypto API.

Dice Roller Questions

D4, D6, D8, D10, D12, and D20 - the six standard dice used in tabletop RPGs, board games, and classroom activities.

Yes. Use the count stepper to roll up to 10 dice simultaneously. Each die result is shown individually and the total is prominently displayed.

Yes. Each roll uses crypto.getRandomValues for cryptographically secure randomness, ensuring unbiased results regardless of how many times you roll.

A D20 is the central die in Dungeons & Dragons and many other tabletop RPGs, used for attack rolls, skill checks, and saving throws. A natural 20 is a critical hit!

Yes. The last 5 totals are shown in the roll history section below the current result so you can track outcomes across a game session.