Dice Roller

Roll multiple dice, apply modifiers, and view the full roll breakdown.

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Number of dice

Sides per die

Modifier

Result

Enter values to calculate.

Summary

Waiting for input

Detail

Waiting for input

Roll any number of dice with any number of sides, apply a numeric modifier, and see the outcome of every individual die.

How It Works

How Dice Roller Works

For each die you roll, the calculator generates a random whole number between 1 and your chosen number of sides, simulating a fair physical die. All the individual rolls are added together to get a subtotal, and any modifier you enter (positive or negative) is added on top to get the final total.

Because each die is rolled independently, the results follow the same probability distribution as physical dice — for a standard 6-sided die, each face has an equal 1-in-6 chance on every roll.

Worked Example

See It In Action

Rolling 2 six-sided dice (2d6) with a +2 modifier might produce individual rolls of, say, 4 and 5 — a subtotal of 9 — which becomes a final total of 11 once the modifier is added.

Real-World Use Cases

Who Uses Dice Roller and Why

Rolling dice for a tabletop RPG session when physical dice aren't handy, using standard notation like 3d6+2.
Simulating a large number of dice rolls quickly, such as rolling several d20s at once for a group of characters.
Settling a decision randomly by rolling a single die with a custom number of sides.
Checking probability intuition by rolling the same dice combination repeatedly and comparing results.

Common Mistakes

Mistakes to Avoid

Assuming the modifier applies to each individual die rather than the combined total — it's added once to the sum of all dice, matching standard tabletop notation, not per-die.
Forgetting to change "sides per die" from the default when a game calls for something other than six-sided dice, like a d20 or d4.

Pro Tips

Tips for Best Results

Use standard notation as a mental shortcut: "number of dice" + "sides per die" + "modifier" maps directly to notation like 2d6+3.
For games needing dice with non-standard side counts (d10, d12, d20), just set "sides per die" accordingly — the roller works the same way regardless of side count.

Troubleshooting

Fixing Common Problems

The total looks higher or lower than I expected for the notation I had in mind. — Double-check the modifier is meant to apply once to the total, not per die — a 3d6+2 roll adds +2 only once to the sum of the three dice, not +2 to each individual die.

Glossary

Terms Explained

Modifier: A flat bonus or penalty added once to the total of all dice rolled, as in the "+2" in 3d6+2.

Dice notation: A shorthand like "3d6+2" meaning roll three six-sided dice and add 2 to the total, standard across tabletop gaming.

FAQ

Frequently Asked Questions

Is this truly random, like a physical die?

Each roll is generated independently with equal probability across all sides, matching the statistical behavior of a fair physical die, though it uses standard software randomness rather than a cryptographic source.

What is this useful for?

It's commonly used for tabletop role-playing games (like rolling a d20 for an attack roll, or 2d6 for damage), board games that need dice, or any situation needing a quick random number in a set range.

Can the modifier be negative?

Yes — enter a negative number to subtract from the dice total, which is common for penalties in tabletop games.

What is the largest number of dice or sides I can roll?

You can roll practical quantities of dice with any number of sides (from standard d4s and d6s up to unusual dice like d20 or d100) — extremely large values may take a moment longer to display but will still calculate correctly.