Dice Pool Roller

What this generator does

Rolls a pool of dice and counts how many meet or beat a target number, rather than adding them up. This is the core mechanic of several tabletop systems, where the question is how many successes you scored, not what the total was.

How to use this tool

1. Choose the number of sides per die.
2. Choose how many dice to roll.
3. Set a success threshold.
4. Roll to see each result and the success count.

Understanding the controls

Number of dice

How many dice are rolled, from 1 to 30. More dice means more chances at a success, and the success count grows roughly in proportion.

Success threshold

The value a die must meet or beat to count as a success. Lowering it makes each die more likely to succeed — a threshold of 1 makes every die an automatic success, and the threshold cannot be set above the number of sides.

Worked examples

A d6 pool needing 4 or better

Roll a pool of 8 six-sided dice against a threshold of 4. Each die has a 3-in-6 (50%) chance of success on its own, so the pool averages 4 successes, though any individual roll varies around that.

Common use cases

• Dice-pool tabletop RPG systems
• Custom probability games
• Classroom probability demonstrations

How this generator works

Each die in the pool is rolled independently from your browser's Web Crypto generator, and any result meeting or beating the threshold counts as a success. Each die's own success chance is fixed by the threshold and the number of sides — on a d6 needing a 4 or better, that is 3 in 6, or exactly half — so the expected number of successes in the pool is simply the pool size times that per-die chance.

Limitations and good to know

• Capped at 30 dice per pool. Larger pools than that are rare even in dice-pool systems and would make the individual results unwieldy to read.
• This counts successes only; it does not apply any system's rules for what a given number of successes means, botches, or exploding/re-rolling dice.