Can I roll a die with any number of sides?

Yes, choose Custom and enter any side count of 2 or more.

Is this fair, like a real physical die?

Statistically yes — Math.random() gives each side an equal 1-in-N chance, same as an unweighted physical die.

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Math & Everyday

Dice Roller

Roll any standard die (d4-d100) or a custom side count, with an optional modifier.

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About the Dice Roller

Rolls any standard tabletop die (d4 through d100) or a custom side count, any number of dice at once, with an optional flat modifier added to the total.

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How to use it

Choose a die type (or Custom for any side count).
Set how many dice to roll and an optional modifier.
Click Roll to see each individual result plus the total.

Formula

Each die: Math.floor(Math.random() * sides) + 1, giving a uniform integer from 1 to the die's side count; the total sums all dice plus any flat modifier.

Worked example

Rolling 2d6+2 might show individual rolls of 4 and 5 (sum 9), plus the +2 modifier, for a total of 11.

Recommendations

• Use the standard NdM shorthand (e.g. 3d6) to quickly describe a roll to others.
• A modifier can be negative — enter e.g. -1 to subtract from the total.

Frequently asked questions

Yes — every die is rolled separately with its own random draw; results aren't correlated with each other.