Percentile Dice Roller (d100)

What this generator does

Rolls percentile dice — a tens die and a units die read together as a number from 1 to 100. It is the standard mechanic in percentile-based tabletop systems, where difficulty is expressed as a percentage chance.

How to use this tool

1. Choose how many d100 to roll.
2. Roll to see each result and the total.

Common use cases

• Percentage-based random tables
• Tabletop RPG percentile checks
• Any game needing a 1-100 random number

Randomness and fairness

The tens and units dice are rolled independently with your browser's cryptographic random number generator and then read as a percentile, so all one hundred results are equally likely — including the 00 that reads as 100. A seed swaps in a deterministic, non-cryptographic generator, which reproduces the same rolls from the same word. Reach for it when a table needs to replay a roll, never when the roll is meant to be unpredictable.

For how randomness is produced across the whole site, see how Generate Random works.

Limitations and good to know

• Every value from 1 to 100 is equally likely, so a roll-under target of 35 succeeds 35% of the time. There is no bell curve here, unlike rolling multiple dice and adding them.