Roll 2D20 - Advantage & Disadvantage
Roll two twenty-sided dice at once with realistic 3D physics. In D&D 5e, rolling with advantage means rolling 2d20 and taking the higher result. Disadvantage means taking the lower. This roller shows both results instantly so you can pick the one you need.
Advantage and Disadvantage in D&D 5e
Advantage and disadvantage are core mechanics in D&D 5th Edition that replace most numerical bonuses and penalties. When you have advantage, roll two D20s and use the higher result. When you have disadvantage, roll two D20s and use the lower. If you have both advantage and disadvantage from any number of sources, they cancel out and you roll normally. Advantage effectively adds about +3.3 to your average roll, while disadvantage subtracts the same.
Common Sources of Advantage
You gain advantage on attack rolls when: attacking a prone enemy in melee, attacking while hidden or invisible, using the Help action, Reckless Attack (barbarian), or when an ally casts Faerie Fire on the target. For ability checks, spells like Enhance Ability and features like Bardic Inspiration variants grant advantage. For saving throws, features like Aura of Protection and certain racial traits provide advantage against specific effects.
Frequently Asked Questions
What are the odds of rolling a natural 20 with advantage?
With advantage, you have a 9.75% chance of rolling at least one natural 20 (compared to 5% with a single d20). The math: 1 - (19/20 × 19/20) = 9.75%. Advantage nearly doubles your crit chance.
Do advantage and disadvantage stack?
No. In D&D 5e, having multiple sources of advantage still counts as just advantage. Similarly, any number of disadvantage sources still counts as single disadvantage. If you have at least one source of each, they cancel out entirely — you roll a single d20.
Can I use this for Elven Accuracy?
Elven Accuracy lets you reroll one die when you have advantage on an attack using Dexterity, Intelligence, Wisdom, or Charisma. Roll 2d20 here, then if you want to use Elven Accuracy, roll a single d20 to replace your lowest result.