A D8 (eight-sided die) is an octahedron-shaped die commonly used in tabletop role-playing games. This virtual dice roller simulates rolling a D8, generating a random number between 1 and 8.
How To Use The D8 Roller
- Set the number of times you want to roll
- Set how many D8 dice to roll per attempt
- Click "Roll dice" to generate your results
- View individual roll results or the grand total
Common Uses For D8 Dice
- Damage rolls: Longswords, rapiers, and battleaxes deal 1d8 damage
- Hit dice: Clerics, Rogues, and many classes use d8 for HP
- Healing spells: Cure Wounds heals 1d8 + modifier
- Directional choices: Random compass direction (N, NE, E, SE, S, SW, W, NW)
D8 Probability
Each face of a fair D8 has an equal 12.5% chance:
| Result | Probability |
|---|
| 1-8 | 12.5% each |
The expected average roll is 4.5 when rolling a single D8.
D8 In Gaming
The D8 is one of the most commonly rolled dice in D&D and similar games:
- Versatile weapons: Longswords and battleaxes deal 1d8 one-handed, 1d10 two-handed
- Martial weapons: Many popular weapons like rapiers deal 1d8
- Healing magic: Most healing spells use d8 as their base die
- Hit points: Several popular classes (Cleric, Rogue, Monk, Bard) use d8 for HP
The Octahedron
The D8 is shaped like two square-based pyramids joined at their bases. It's one of the five Platonic solids and is mathematically fair, meaning each face has an equal probability of landing face up.