Why do I keep rolling close to zero?

Because the four faces tend to cancel out. A total of 0 comes up on 19 of the 81 equally likely combinations (about 23%), and results of -1, 0 or +1 together account for about 63% of all rolls — the extremes of +4 and -4 need all four dice to match, which happens only 1 time in 81 for each.

Narrative Dice Roller

Roll four dice, each showing +1, 0, or -1, and see the total — the generic "narrative dice" mechanic used by several modern tabletop RPGs. This is a system-neutral implementation, not tied to or affiliated with any specific published game.

Your roll will appear here.

What this generator does

Rolls four dice showing plus, minus or zero and adds them, so a result says by how much something went well or badly rather than just pass or fail. Used by story-driven tabletop systems where a mixed outcome is more interesting than a pass or fail.

How to use this tool

Press roll to roll four narrative dice.
Read the individual faces and the total.

Worked examples

A middling result: Faces of +1, 0, 0, -1 sum to 0 — the most likely total, occurring on roughly 1 in 4 rolls.

Common use cases

Tabletop RPGs using a plus/minus/blank dice mechanic
Quick narrative-weighted random checks

How this generator works

Each of the four dice independently lands on -1, 0 or +1 with equal (one-in-three) probability, drawn from your browser's Web Crypto generator, and the total is their sum. Because the four faces are combined, the total of 0 is the single most common result — it comes up on 19 of the 81 equally likely combinations, roughly 23% of rolls — and the extremes of +4 and -4 (all four dice matching) are the rarest, at 1 in 81 each. The full spread is exact rather than sampled: 1, 4, 10, 16, 19, 16, 10, 4, 1 combinations for totals -4 through +4.

Limitations and good to know

Symbols need interpreting against your game's own rules. The tool rolls the dice; what a given combination means at your table is a judgement for the group.
The total clusters toward zero far more than a d20 or percentile roll would suggest — treat a result of +2 or more as a genuinely strong roll, since it happens on only about 18.5% of rolls (15 of the 81 equally likely combinations).

Unofficial, system-agnostic fan tool. Not affiliated with or endorsed by any tabletop RPG publisher, and does not reproduce any publisher's rules, tables or setting material.

Frequently asked questions

Why do I keep rolling close to zero?: Because the four faces tend to cancel out. A total of 0 comes up on 19 of the 81 equally likely combinations (about 23%), and results of -1, 0 or +1 together account for about 63% of all rolls — the extremes of +4 and -4 need all four dice to match, which happens only 1 time in 81 for each.