Polyhedral Tabletop Dice Roller

How to use this tool

1. Choose which die types to roll (d4 through d100) and how many of each.
2. Optionally add a modifier.
3. Roll to see each individual result and the combined total.

Worked examples

A damage roll of 2d6 plus 1d8

Set two six-sided and one eight-sided die, then roll them together and read the combined total instead of rolling in two passes.

Percentile rolls

A d100 gives a flat 1–100. Unlike two ten-sided dice read as tens and units, there is no chance of misreading which die is which.

Common use cases

• Tabletop RPG sessions needing a full dice set
• Damage rolls combining multiple die types
• Learning probability with varied die sizes

How this generator works

Each die type you select is rolled independently — a d4, d6, d8, d10, d12 or d20 each produce a whole number in their own range, drawn from your browser's Web Crypto random generator with the range conversion corrected so every face stays equally likely. Mixed sets are rolled in one pass and totalled together, so a handful of different dice behaves exactly like throwing them all at once on the table.

Limitations and good to know

• This rolls dice; it does not apply any game's rules. Criticals, re-rolls, exploding dice and keep-highest mechanics are separate tools or your own bookkeeping.
• Larger dice pools produce totals that cluster toward the middle. That is the mathematics of adding dice, not a quirk of this roller.
• No roll history is kept, so results cannot be checked afterwards by other players.

Frequently asked questions

Which dice does this roll?

All the standard dice from a tabletop polyhedral set in one place: d4, d6, d8, d10, d12, d20 and d100 (percentile), so you don't need to roll each one separately.

Is this fair for tabletop games?

Yes — every die uses your browser's cryptographically secure random number generator, so results are unbiased and can't be predicted or manipulated.