D8 Dice Roller
The octahedron. A workhorse damage die across tabletop systems.
Ready to roll 1d8
Quantity
Modifier
1d8 · Eight-Sided Die
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What is a D8?
A D8 is a eight-sided die. It has 8 faces numbered 1 to 8, and on a fair die each one is equally likely, so any single face comes up 12.5% of the time. You will usually see it used for longsword damage, hit dice and spell effects.
- Sides
- 8
- Average roll
- 4.5
- Lowest
- 1
- Highest
- 8
D8 odds
Every face on a D8 has the same 12.5% chance. Rolling the die more than once does not change that. Each roll is independent, so a run of low numbers tells you nothing about what comes next.
Across many rolls the average settles near 4.5, which is the number to use when you are comparing this die against another.