Dice Roller
Roll virtual dice for board games, RPGs, D&D, or any decision-making. Supports d4, d6, d8, d10, d12, d20, and d100. Roll multiple dice at once with history tracking and statistics.
Roll History
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What Is a Dice Roller?
A dice roller is a tool that simulates the rolling of physical dice using random number generation. It's used in tabletop role-playing games (like D&D), board games, and any situation where you need a random number between 1 and a specified maximum.
This virtual dice roller supports seven common dice types: d4, d6, d8, d10, d12, d20, and d100. You can roll multiple dice at once, add modifiers, and track your roll history with statistics.
How Does the Dice Roller Work?
The dice roller uses JavaScript's Math.random() function to generate random numbers:
For each die: Math.floor(Math.random() × sides) + 1
Total: Sum of all dice results
Final: Total + Modifier
Each roll is recorded in the history with the dice type, individual results, total, modifier, and final value. Statistics are updated automatically to show your rolling trends.
Why Use This Dice Roller?
- Seven Dice Types: Supports d4, d6, d8, d10, d12, d20, and d100.
- Multiple Dice: Roll up to 20 dice at once.
- Modifiers: Add or subtract modifiers to your rolls.
- History & Statistics: Track your rolls and see averages, highs, and lows.
- Free & Private: No registration, no data storage.
Common Uses for a Dice Roller
- Tabletop RPGs: D&D, Pathfinder, Call of Cthulhu, and more.
- Board Games: Monopoly, Risk, Settlers of Catan, and more.
- Decision Making: Choosing between options randomly.
- Education: Teaching probability and statistics.
- Game Development: Testing random mechanics and probabilities.
❓ Dice Roller FAQ
What dice types are supported?
This dice roller supports d4, d6, d8, d10, d12, d20, and d100. These are the most common dice used in tabletop RPGs and board games.
How many dice can I roll at once?
You can roll up to 20 dice at once. This is useful for rolling damage in RPGs or when you need multiple random numbers quickly.
What is a modifier in dice rolling?
A modifier is a number you add to or subtract from your dice roll. In RPGs like D&D, modifiers are often added to attack rolls or skill checks based on character stats.
What does d20 mean?
d20 means a 20-sided die. It's the most iconic die in Dungeons & Dragons and is used for attack rolls, saving throws, and ability checks.
What does d100 mean?
A d100 is a 100-sided die, often used for percentile rolls in RPGs. It can be simulated by rolling two d10s — one for the tens digit and one for the ones digit.
Is this dice roller truly random?
This dice roller uses JavaScript's Math.random() function, which generates pseudo-random numbers. While not truly random in the cryptographic sense, it's more than sufficient for games and casual use.
Can I roll with advantage or disadvantage?
Yes! To simulate rolling with advantage (roll twice and take the higher result), roll two dice and manually take the higher value. For disadvantage, take the lower value. The history shows each roll.
What is a critical hit in D&D?
In D&D 5e, rolling a natural 20 on a d20 attack roll is a critical hit. You roll double the damage dice. This dice roller doesn't automate critical hits, but you can manually roll additional dice.
What is a critical failure?
A critical failure (or "natural 1") on a d20 roll typically means an automatic failure in D&D. Some DMs add additional penalties for rolling a 1.
How do I roll a d100?
Select the "d100" button. The dice roller will generate a number from 1 to 100, simulating a percentile die.
What does the "modifier" field do?
The modifier is added to (or subtracted from) the total of your dice roll. For example, if you roll a 12 on a d20 and have a +3 modifier, the final result is 15.
How is the average calculated?
The average is calculated by summing all final results (total + modifier) and dividing by the number of rolls. This gives you a sense of your typical roll value.
What are the odds of rolling a natural 20?
On a single d20, the odds of rolling a 20 are 1 in 20, or 5%. The odds are the same for any specific number on a fair die.
What is the difference between a die and a dice?
"Die" is the singular form (one die). "Dice" is the plural form (multiple dice). In casual usage, "dice" is often used for both singular and plural.
Can I use this dice roller on my phone?
Yes. This dice roller is fully responsive and works on smartphones, tablets, and desktop computers. The buttons are designed to be touch-friendly.
How do I clear the roll history?
Click the "Clear" button to remove all roll history and reset the statistics. This is useful when starting a new game or session.
Is this dice roller suitable for D&D?
Absolutely! This dice roller supports all the standard D&D dice (d4, d6, d8, d10, d12, d20, d100) and allows for modifiers. It's perfect for online play or when you don't have physical dice.
Can I roll dice with different sides at the same time?
Currently, you can only roll dice with the same number of sides at once. To roll different dice types, make separate rolls and combine the results manually.