D&D Dice Rolling
Dungeons & Dragons uses polyhedral dice for nearly every game mechanic. The d20 determines success or failure on attacks, saves, and ability checks. Other dice determine damage, healing, and random effects. Understanding the different roll types and when to use them is essential for smooth gameplay.
This roller handles the most common D&D roll types, including the popular 4d6-drop-lowest method for generating ability scores, attack rolls with advantage/disadvantage, and custom damage dice expressions.
Common Roll Types
| Roll | Dice | Modifiers |
|---|---|---|
| Attack | 1d20 | + ability + proficiency |
| Damage | Weapon dice | + ability modifier |
| Saving Throw | 1d20 | + ability + proficiency (if proficient) |
| Initiative | 1d20 | + Dexterity modifier |
| Ability Score | 4d6 drop lowest | None |
Ability Score Generation
This method produces scores ranging from 3 to 18, with an average of about 12.24. Scores of 15+ are considered strong, 8-9 are below average, and 3 is the theoretical minimum (extremely rare at 0.08% chance).
Combat Rolls
In combat, you roll d20 + attack modifier vs the target's AC. A natural 20 always hits and is a critical hit (roll damage dice twice). A natural 1 always misses regardless of modifiers. Advantage rolls 2d20 and takes the higher; disadvantage takes the lower.
Frequently Asked Questions
What is the 4d6 drop lowest average?
The average ability score from 4d6 drop lowest is approximately 12.24, compared to 10.5 for straight 3d6. This method produces slightly above-average characters.
Can I crit on a saving throw?
In D&D 5e, natural 20s and 1s on saving throws are not automatic successes/failures by RAW (rules as written), though many groups play with this house rule.
What is the best ability score generation method?
Common methods include 4d6 drop lowest, standard array (15,14,13,12,10,8), and point buy (27 points). Each balances randomness vs fairness differently.