Online Dice1d3 · one choice from 3 outcomes
A D3 chooses between three numbered options. It is handy for a short prompt list or a small damage expression, and spares you the task of interpreting a larger die. Three possibilities are plenty when the choices are already interesting.
Number three story openings: 1 for an unexpected visitor, 2 for a missing object, and 3 for a strange message. A roll of 2 selects the missing object. Each entry occupies one result, so each has a one-in-three chance.
Illustrated face: 2 → the missing object.
Try it for three possible paths, three moods for a character, or a short list of writing prompts. You can also use D3 rolls to demonstrate a probability that is one third rather than one half.
The average face is 2, but the middle path has the same one-third weight as the other two. A small set of rolls can easily repeat one option before the others appear.
A physical D6 can stand in for a D3 if you agree on a mapping such as 1–2 → 1, 3–4 → 2, and 5–6 → 3. Reading the raw D6 result as a D3 result without that mapping changes the range.
Two D3s add to 2–6, but they do not behave like one D6. The middle total, 4, can occur in three different ordered ways; 2 and 6 have only one way each.