Dice Roller

Roll any standard dice — d4, d6, d8, d10, d12, d20, d100 — or enter a custom NdX+modifier expression. Perfect for tabletop RPGs, board games, and probability experiments.

Quick Roll

Custom Roll e.g. 2d6+3, 1d20, 3d8-1

Dice Notation Guide

Standard dice notation uses the format NdX+M where N is the number of dice, X is the number of sides, and M is an optional modifier.

1d6

One six-sided die

2d6+3

Two d6 plus 3

1d20

D20 (attack roll)

4d6

Four d6 (ability score)

1d100

Percentile

3d8-2

Three d8 minus 2

Frequently Asked Questions

What is a d20 used for in D&D?

The d20 (20-sided die) is the core die in Dungeons & Dragons. It is rolled for attack rolls, ability checks, and saving throws. You roll d20 + your relevant modifier against a target number (DC or AC). A natural 20 is a critical hit; a natural 1 is a critical fail.

How do I roll ability scores in D&D 5e?

The standard method is to roll 4d6 and drop the lowest die, repeating six times for the six ability scores (Strength, Dexterity, Constitution, Intelligence, Wisdom, Charisma). The average result is about 12.2 per score. Some groups use point-buy or the standard array (15, 14, 13, 12, 10, 8) instead.

What is a percentile dice (d100)?

A d100 (or percentile die) gives a result from 1 to 100. Traditionally it is rolled as two d10s — one representing tens (00–90) and one representing units (0–9). A result of 00 and 0 is usually read as 100. It is used for percentage-based skill checks and random tables.

What does rolling with advantage mean?

Rolling with advantage means you roll two d20s and take the higher result. Disadvantage is the opposite — roll two d20s and take the lower. Mathematically, advantage raises the average d20 roll from 10.5 to about 13.8, and disadvantage lowers it to about 7.2.