Roll a d100 (Percentile Dice)

A d100, or percentile roll, gives a number from 1 to 100 — used for percentage chances and random tables in RPGs like Call of Cthulhu and Warhammer. This roller does it in one tap, with no pair of percentile dice to read. Everything runs locally in your browser.

FAQ

How does a d100 work?

Physically, a d100 is rolled as two ten-sided dice — one for the tens digit, one for the ones — giving 1 to 100 (00 reads as 100). This tool rolls the full range directly, so you get a flat 1-in-100 chance for every result.

Are these d100 rolls really random?

Yes. Each die uses your browser’s cryptographic random generator with rejection sampling, so every face has an exactly equal chance — no modulo bias, no loaded dice.

Does this dice roller run in my browser?

Yes. Every roll happens locally on your device — nothing is uploaded and it works offline once the page has loaded.

Need different dice, custom notation like 2d8+3, or a roll history? Use the full Dice Roller.

Other rolls

• d20
• d6
• d12
• d10
• d8
• d4
• 2d6
• 3d6
• 4d6 drop lowest
• Custom dice →