Rollune
Your ability modifier is (score − 10) ÷ 2, rounded down: 10–11 is +0, 12–13 is +1, 14–15 is +2, 16–17 is +3, 18–19 is +4, 20 is +5. You add the modifier, not the score, to checks, saving throws, attacks and damage.
Score to modifier
| Score | Modifier | Score | Modifier | |
|---|---|---|---|---|
| 1 | −5 | 16–17 | +3 | |
| 2–3 | −4 | 18–19 | +4 | |
| 4–5 | −3 | 20–21 | +5 | |
| 6–7 | −2 | 22–23 | +6 | |
| 8–9 | −1 | 24–25 | +7 | |
| 10–11 | +0 | 26–27 | +8 | |
| 12–13 | +1 | 28–29 | +9 | |
| 14–15 | +2 | 30 | +10 |
Formula: modifier = floor((score − 10) ÷ 2). The Rollune app and our character sheet creator use exactly this.
The six abilities
| Ability | Measures | Used for |
|---|---|---|
| Strength (STR) | physical power | melee attacks and damage, Athletics, carrying |
| Dexterity (DEX) | agility, reflexes | AC, initiative, ranged and finesse attacks, Stealth, Acrobatics |
| Constitution (CON) | endurance | hit points, concentration saves |
| Intelligence (INT) | reasoning, memory | wizard spells, Arcana, History, Investigation |
| Wisdom (WIS) | perception, insight | cleric/druid/ranger spells, Perception, Insight, Survival |
| Charisma (CHA) | force of personality | bard/paladin/sorcerer/warlock spells, Persuasion, Deception |
Where the modifier goes
- Ability checks: d20 + modifier (+ proficiency if proficient in the skill).
- Saving throws: d20 + modifier (+ proficiency if your class grants it). See saving throws explained.
- Attacks: d20 + STR or DEX modifier + proficiency.
- Damage: weapon die + the same modifier.
- Spell save DC: 8 + proficiency + spellcasting modifier.
Odd scores
An odd score gives the same modifier as the even number below it (15 and 14 are both +2). Odd scores are worth keeping if you expect a +1 increase soon, from a feat or level-up.
Primary abilities by class
Barbarian STR · Bard CHA · Cleric WIS · Druid WIS · Fighter STR or DEX · Monk DEX and WIS · Paladin STR and CHA · Ranger DEX and WIS · Rogue DEX · Sorcerer CHA · Warlock CHA · Wizard INT.
Roll with your modifiers
In the Rollune app, pick your character and arm a stat: every roll adds the right modifier automatically. See the character tracker.
