What dice are used in D&D?

Most D&D tables use a full polyhedral set: d4, d6, d8, d10, d12, d20, and d100. d20 handles attacks, saves, and checks, while the others are commonly used for damage and random tables.

How do advantage and disadvantage work in D&D 5e?

With advantage you roll 2d20 and keep the higher die. With disadvantage you roll 2d20 and keep the lower die. Multiple sources typically cancel to a normal roll rather than stacking.

What is a d100 (percentile) roll?

A d100 (percentile) roll generates a number from 1 to 100. It’s often used for random tables, wild magic, and percentage chances.

When is a natural 20 a critical hit in D&D?

A natural 20 is typically a critical hit on attack rolls. For saving throws and ability checks, a natural 20 does not automatically create a crit by the base rules (some tables use house rules).

Can I add modifiers to my rolls?

Yes. Enter any modifier (ability modifier, proficiency bonus, magic bonus, or situational bonus) and the roller shows both the raw die and the final total.

Is this D&D dice roller fair?

Rolls are generated locally in your browser using a pseudorandom process designed to be unbiased over many rolls. It’s suitable for games and everyday play, not for cryptographic use.

D&D Dice Roller (d4–d100) | Advantage/Disadvantage & Modifiers

D&D Dice Roller with Advantage and Modifiers

This professional D&D dice roller supports all polyhedral dice types (d4, d6, d8, d10, d12, d20, d100) with advantage/disadvantage mechanics, modifiers, and automatic critical detection for D&D 5e.

Dice Roll Formula (D&D 5e)

Total = dice result + modifier

Advantage: roll 2d20 and keep the higher die.
Disadvantage: roll 2d20 and keep the lower die.
Criticals: a natural 20 is typically a critical hit on attack rolls; a natural 1 is typically an automatic miss on attack rolls.

Example: Rolling d20 with a +6 bonus vs AC 15 is a hit when the d20 shows 9 or higher (because 9 + 6 = 15).

Features for Dungeon Masters and Players

Advantage/Disadvantage: Roll twice and automatically take the higher or lower result
Modifiers: Add ability scores, proficiency bonuses, and situational modifiers
Critical Detection: Automatic highlighting of natural 20s and natural 1s
Quick Presets: One-click access to common D&D rolls like attacks, damage, and initiative
All Dice Types: Complete set of RPG dice from d4 to d100

How to Use for D&D

Select your dice type (d20 for most rolls), choose normal/advantage/disadvantage, add any modifiers, and roll. The result shows both the dice roll and final total. Perfect for:

Attack rolls with advantage
Ability checks with modifiers
Damage rolls for spells and weapons
Initiative and saving throws

D&D 5e Mechanics

This roller follows D&D 5th Edition rules:

Advantage: Roll two d20s, use the higher result
Disadvantage: Roll two d20s, use the lower result
Critical Hit: Natural 20 on attack rolls
Critical Failure: Natural 1 on attack rolls and death saves

D&D Dice Types

Each die in D&D has a specific shape and use:

d4 (Tetrahedron): A four-sided pyramid shape. Used for daggers, darts, and minor spells.
d6 (Cube): A classic six-sided die. Used for short swords, firebolt, and many basic weapons.
d8 (Octahedron): Eight-sided diamond shape. Used for longswords, healing spells, and divine smite.
d10 (Pentagonal Trapezohedron): Ten-sided die. Used for battleaxes and damage calculation.
d12 (Regular Dodecahedron): Twelve-sided die. Used for greataxes and heavy hitting weapons.
d20 (Regular Icosahedron): Twenty-sided die. Used for all attack rolls, ability checks, and saving throws.
d100 (Percentile): Combines two d10s to generate numbers 1-100. Used for random tables and percentages.

Perfect for D&D 5e, Pathfinder, and other d20 system RPGs. Updated: December 27, 2025

D&D Dice Roller (d4–d100)

Quick Start

Need a Skill Check?

D&D Dice Roller with Advantage and Modifiers

Dice Roll Formula (D&D 5e)

Features for Dungeon Masters and Players

D&D Dice Roller (d4–d100)

Quick Start

Need a Skill Check?

D&D Dice Roller with Advantage and Modifiers

Dice Roll Formula (D&D 5e)

Features for Dungeon Masters and Players

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