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Dice Outcomes

D20 Roller

For ability checks, attacks and saving throws in tabletop role-playing games.

Roll mode

Roll one d20. The modifier is added after the die is chosen.

Ready to roll

Saved D20 presets

Save checks you roll often, like an attack or a saving throw.

Recent rolls

No rolls yet. Your last 100 rolls are kept in this browser.

Advantage and disadvantage

Many tabletop role-playing games, including Dungeons & Dragons fifth edition, use these rules for checks, attacks and saving throws. This is an independent roller, not an official D&D tool.

Advantage rolls two d20s and keeps the higher. Disadvantage rolls two and keeps the lower. Both dice are shown so you can see what happened; the kept die is highlighted.

The modifier is added after the die is chosen. For example, if you roll 7 and 16 with advantage and a +3 modifier, the 16 is kept and the result is 19.

What this roller doesn't do

It doesn't apply game-specific rules such as automatic critical hits or fumbles on a natural 20 or 1 — those depend on your game and table. The raw die values are always visible so you can apply your own rules.

Curious about the odds? A single d20 has a 30% chance of rolling 15 or higher.