Dice Roller

Roll virtual dice for games, probability experiments, and random number generation. Supports multiple dice types, custom sides, and advanced rolling options.

Dice Configuration

Quick Dice Types:

Number of Dice:

Sides per Die:

Modifier (optional):

Applied to the total sum of all dice

Exploding DiceRoll again on maxDrop LowestRemove lowest rollDrop HighestRemove highest rollReroll OnesReroll any 1s once

Quick Examples:

Roll Results

1d6

2:09:13 PM

Individual Dice:

Sum before modifier: 1

This Roll

Min possible: 1

Max possible: 6

Average: 3.5

Session Stats

Total rolls: 1

Highest: 1

Lowest: 1

Roll History

11d6

2:09:13 PM

How to Use

Choose a quick dice type or set custom number of dice and sides per die.

Add modifiers if needed (bonus/penalty to total result).

Enable advanced options like exploding dice or dropping lowest/highest rolls.

Click "Roll" to generate random results and view individual dice values.

Dice Notation Guide

Standard Notation

Basic Format

XdY: Roll X dice with Y sides each
1d6: One six-sided die
3d8: Three eight-sided dice
2d10+5: Two ten-sided dice plus 5

Common Dice

d4: Tetrahedral (pyramid)
d6: Cubic (standard die)
d8: Octahedral
d10: Pentagonal trapezohedron
d12: Dodecahedral
d20: Icosahedral
d100: Percentile dice

Advanced Options

Exploding Dice

When a die shows its maximum value, roll it again and add to the total. This can create very high results!

Drop Lowest/Highest

Remove the lowest or highest die from the total. Commonly used in RPGs for ability score generation.

Reroll Ones

Any die showing a 1 is rolled again once. Helps avoid very low results.

Modifiers

Add, subtract, multiply, or divide the total by a fixed number for bonuses or penalties.

Applications

Gaming

• Tabletop RPGs (D&D, Pathfinder)
• Board games
• Dice games
• Character creation
• Combat resolution

Education

• Probability experiments
• Statistics lessons
• Random sampling
• Math games
• Decision making

General Use

• Random number generation
• Making decisions
• Lottery simulations
• Game development testing
• Randomization experiments

Example Rolls

Common Gaming Scenarios

Attack Roll (D&D): 1d20 + 5
Roll a 20-sided die and add 5 for attack bonus

Damage Roll: 2d6 + 3
Roll two 6-sided dice and add 3 for weapon damage

Ability Scores: 4d6 (drop lowest)
Roll four 6-sided dice, drop the lowest for character stats

Probability Examples

Standard Die: 1d6
Equal 16.67% chance for each number 1-6

Two Dice Sum: 2d6
Bell curve distribution, 7 is most likely (16.67%)

Percentile: 1d100
Generate random percentage from 1-100

Frequently Asked Questions

Are the dice rolls truly random?

The dice roller uses JavaScript's Math.random() function, which generates pseudorandom numbers. While not cryptographically secure, it's perfectly suitable for games and general use.

What's the difference between exploding dice and regular dice?

Exploding dice "explode" when they roll their maximum value - you roll again and add the result. This can theoretically produce unlimited high results, making the game more exciting and unpredictable.

How do I read dice notation like "3d6+2"?

"3d6+2" means roll three six-sided dice, add them together, then add 2 to the total. The format is always [number of dice]d[sides per die][modifier].

Can I use this for serious probability calculations?

Yes! This tool is excellent for educational purposes, probability experiments, and statistical analysis. The roll history helps you track patterns and verify expected distributions over many rolls.