Know the odds
Probability, made playable.
Expected total7
Chance2.8%
Rolls this session0
D12 roller
Roll a d12, online and free.
A dedicated twelve-sided dice roller for greataxe damage, barbarian hit dice, and Hunter’s Mark — the die you own but rarely dig out. Instant odds, live history, modifier support. No app, no sign-up.
🔥 0-day streak
ROLL CONFIGURATION1d12
Share a room and everyone sees the same rolls live — no more "did you actually roll that?"
Room
total—
Try 1d12+4 (greataxe), 2d12, or 2d12+3 (crit).
Why a dedicated d12 roller
The d12 is the standard set’s underdog — a rhombic dodecahedron that, in fifth-edition D&D, mostly rolls greataxe damage, the barbarian’s hit die, and the bonus damage on Hunter’s Mark and Hex. That’s exactly why a dedicated page helps: when a roll does call for it, you don’t want to be hunting through a notation field. Presets cover the raging-barbarian greataxe swing and a doubled crit, and the history panel keeps a combat round straight.
Each of 1–12 lands with an equal 8.33% chance, drawn locally with no seeding or server round-trip. Add dice and the total curves toward the average of 6.5 per die; the dice probability guide has the details. For the full seven-die set use the D&D dice roller, or the main roller for any custom expression.
Frequently asked questions
How do I roll a d12 online?
Use the roller above — it defaults to a single d12. Click "Roll dice", press space, or pick a preset. Type notation like 2d12 or 1d12+4 for multiple dice or a modifier.
What is a d12 used for?
In D&D the d12 is the greataxe damage die, the barbarian hit die, the die for Hunter’s Mark and Hex extra damage, and part of some spell and class features. Outside D&D it shows up in Hero System, some FATE variants, and games that use a "months of the year" table.
What are the odds on a d12?
A fair d12 gives every result from 1 to 12 an equal 8.33% chance, with an average of 6.5 — the highest single-die average in the standard set apart from the d20 and d100.
Is the d12 really the least-used die?
It has that reputation. In fifth-edition D&D only the greataxe, a couple of class features, and the barbarian hit die call for it, so many players go whole campaigns barely touching one. A dedicated page makes the rolls it does cover quick to find.
Can I roll a d12 with a modifier?
Yes. Type notation like 1d12+4 for a raging barbarian’s greataxe swing, or 2d12+3 for a crit. The modifier is added once to the final total.