Know the odds
Probability, made playable.
Expected total7
Chance2.8%
Rolls this session0
D3 roller
Roll a d3, online and free.
A three-sided die result in one click — 1, 2, or 3 — without halving a d6 in your head. Built for Warhammer’s endless "D3 damage" rolls, with modifier support like 1d3+1. No app, no sign-up.
🔥 0-day streak
ROLL CONFIGURATION1d3
Share a room and everyone sees the same rolls live — no more "did you actually roll that?"
Room
total—
Try 1d3, 1d3+1, or 1d3+3 (min 4).
Why a dedicated d3 roller
Almost no dice set includes a real d3, so players improvise by rolling a d6 and halving it — fine once, tedious across a whole game of Warhammer 40,000 or Age of Sigmar, where "D3 damage", "D3 mortal wounds", and "D3 command points" come up on nearly every turn. This page returns a clean 1–3 in a single click, with modifier presets for the D3+1 and D3+3 patterns those rules use to set a guaranteed minimum.
Each of 1, 2, and 3 lands with an equal one-third chance, drawn locally with no seeding or server call — statistically identical to the halved-d6 method, just faster. D&D uses the d3 for a handful of damage and table rolls too. For the standard polyhedral set use the D&D dice roller, or the main roller for custom notation and the probability guide for the math.
Frequently asked questions
How do I roll a d3 online?
Press the roll button above or hit space — it returns 1, 2, or 3. For Warhammer-style rolls, add a modifier with notation like 1d3+1, or roll several with 2d3 or 3d3.
How is a d3 rolled with physical dice?
There is rarely a dedicated d3 in a dice bag, so players roll a d6 and halve it: 1–2 counts as 1, 3–4 as 2, and 5–6 as 3. This roller does that in one step and returns 1, 2, or 3 directly.
What games use a d3?
Warhammer 40,000 and Age of Sigmar lean on it heavily — "D3 damage", "D3 mortal wounds", "D3 command points". D&D uses it for a few effects (some unarmed and improvised damage, certain spells and traps), and many random tables call for a 1–3 result.
What are the odds on a d3?
A fair d3 gives 1, 2, and 3 an equal 33.3% chance each, with an average of 2. Adding a modifier like +1 shifts every outcome up without changing the spread.
What does D3+3 mean in Warhammer?
Roll a d3 and add 3, giving a result of 4, 5, or 6 — a common way to write a value that is random but has a guaranteed minimum. Type 1d3+3 above.