Roll a d20 instantly
The twenty-sided die — the d20 — is the heart of nearly every modern tabletop role-playing game. This roller defaults to a single d20, so one tap gives you a clean result from 1 to 20. There are no dice to lose under the couch and no app to install; the roll happens in your browser the moment you press the button.
What the d20 is used for
In d20-based systems like Dungeons & Dragons 5th edition and Pathfinder, almost every meaningful action resolves on a d20:
- Attack rolls — roll a d20, add your attack bonus, and compare to the target's Armor Class.
- Saving throws — roll a d20 plus the relevant save modifier to resist a spell, poison, or trap.
- Ability checks and skill checks — roll a d20 plus a skill bonus against a Difficulty Class set by the game master.
Natural 20s and natural 1s
A "natural 20" is a raw roll of 20 on the die before any modifiers — on an attack it is an automatic hit and, in most systems, a critical hit that doubles or maximizes damage. A "natural 1" is the opposite: a raw 1, which usually means an automatic miss and, in many tables' house rules, a fumble. Because this tool shows the unmodified die face, you always know whether you scored a natural 20 or a natural 1.
Is each d20 roll fair?
Every face from 1 to 20 has exactly a 5% chance on each roll. The die has no memory, so a string of low rolls does not make a high roll "due." If you want the advantage and disadvantage mechanic — rolling two d20s and keeping the higher or lower — use the full D&D dice roller, which adds those buttons. For a quick single die during play, this d20 roller is the fastest way to get a number you can trust.
Roll a d20 instantly
The twenty-sided die — the d20 — is the heart of nearly every modern tabletop role-playing game. This roller defaults to a single d20, so one tap gives you a clean result from 1 to 20. There are no dice to lose under the couch and no app to install; the roll happens in your browser the moment you press the button.
What the d20 is used for
In d20-based systems like Dungeons & Dragons 5th edition and Pathfinder, almost every meaningful action resolves on a d20:
- Attack rolls — roll a d20, add your attack bonus, and compare to the target's Armor Class.
- Saving throws — roll a d20 plus the relevant save modifier to resist a spell, poison, or trap.
- Ability checks and skill checks — roll a d20 plus a skill bonus against a Difficulty Class set by the game master.
Natural 20s and natural 1s
A "natural 20" is a raw roll of 20 on the die before any modifiers — on an attack it is an automatic hit and, in most systems, a critical hit that doubles or maximizes damage. A "natural 1" is the opposite: a raw 1, which usually means an automatic miss and, in many tables' house rules, a fumble. Because this tool shows the unmodified die face, you always know whether you scored a natural 20 or a natural 1.
Is each d20 roll fair?
Every face from 1 to 20 has exactly a 5% chance on each roll. The die has no memory, so a string of low rolls does not make a high roll "due." If you want the advantage and disadvantage mechanic — rolling two d20s and keeping the higher or lower — use the full D&D dice roller, which adds those buttons. For a quick single die during play, this d20 roller is the fastest way to get a number you can trust.
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Frequently Asked Questions
Common questions about the D20 Roller
A d20 (twenty-sided die) is the core die in tabletop RPGs like Dungeons & Dragons and Pathfinder. You roll it for attack rolls, saving throws, and ability or skill checks, then add the relevant modifier and compare the total to a target number.
A natural 20 is rolling a 20 on the raw die before adding any modifiers. On an attack roll it is an automatic hit and usually a critical hit. This tool displays the unmodified die result, so you can always tell when you roll a natural 20.
A natural 1 is rolling a 1 on the raw die. On an attack it is an automatic miss regardless of your bonuses, and many tables treat it as a fumble. Because the roller shows the unmodified face, a natural 1 is easy to spot.
Each of the twenty faces has an equal 5% (1 in 20) chance on every roll. The die has no memory, so previous results do not change the odds of the next roll.
Advantage means rolling two d20s and keeping the higher result; disadvantage means keeping the lower. This single-die roller covers straight d20 rolls; use the D&D dice roller for built-in advantage and disadvantage buttons.
ℹ️ Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to or stored on our servers. While we strive for accuracy, we make no warranties about the completeness or reliability of results. Use at your own discretion.