📊 Ability Scores Explained
STR · DEX · CON · INT · WIS · CHA — modifier calculator, class optimizer & deep dives
Enter your six ability scores below. The calculator shows your modifier, grade, and linked skills for each stat in real time — plus class recommendations based on your highest scores.
📊 Complete Ability Score Modifier Reference (1–30)
🎯 Difficulty Class (DC) Reference
| Task Difficulty | DC | Example |
|---|---|---|
| Very Easy | 5 | Notice a loudly shouting guard |
| Easy | 10 | Climb a rope with knots |
| Medium | 15 | Pick a simple lock |
| Hard | 20 | Swim in rough seas |
| Very Hard | 25 | Recall obscure lore |
| Nearly Impossible | 30 | Track a dragon through a city |
⚡ Point Buy Optimizer — Get the Perfect Score Distribution
Select your class and preferred race below. The optimizer recommends the ideal 27-point distribution for maximum effectiveness.
D&D Ability Scores Explained — The Complete Guide
The six ability scores — Strength (STR), Dexterity (DEX), Constitution (CON), Intelligence (INT), Wisdom (WIS), and Charisma (CHA) — are the numerical foundation of every character in Dungeons & Dragons 5e. Every attack roll, saving throw, skill check, and spell save DC traces back to one of these six numbers. Understanding what each ability score does, which modifier it produces, and how it connects to your class and skills is the most fundamental piece of D&D system knowledge. This guide explains all six stats in detail, including the full modifier formula, class optimization advice, and the 18 skills that flow from these ability scores.
The Six Ability Scores at a Glance
The Ability Score Modifier Formula
Every ability score produces an ability modifier — a number that gets added (or subtracted) from dice rolls. The formula is:
This produces a range from −5 (score of 1) to +10 (score of 30). In practical play, characters start between −1 (score of 8) and +4 (score of 18) for non-magical scores at character creation.
Quick Modifier Reference Table
| Score | 1–3 | 4–5 | 6–7 | 8–9 | 10–11 | 12–13 | 14–15 | 16–17 | 18–19 | 20 |
|---|---|---|---|---|---|---|---|---|---|---|
| Modifier | −4/−5 | −3 | −2 | −1 | +0 | +1 | +2 | +3 | +4 | +5 |
How Each Ability Score Works in D&D 5e
Strength (STR) — The Physical Power Stat
Strength governs raw physical force — how hard you hit in melee, how well you can climb, swim, or jump, and how much you can carry. The STR modifier adds to attack rolls and damage rolls for all melee weapons that lack the Finesse property (greatswords, battle axes, mauls). Every point of STR above 10 also increases your carrying capacity. STR saving throws protect against being physically moved, shoved, or restrained.
The primary classes that maximize STR are Barbarian, Fighter (STR), and Paladin. Heavy armor wearers care about STR because full plate armor requires 15 STR to wear at full movement speed. Classes that completely dump STR (like Wizard or Rogue) accept the −1 modifier as a reasonable trade — they're never attempting STR checks in optimal play.
Dexterity (DEX) — The Most Versatile Stat
Dexterity is arguably the most universally useful ability score in D&D 5e. It affects your Armor Class when wearing light or medium armor, your Initiative roll at the start of every combat, your ranged attack and damage rolls, and all Finesse weapon attacks. The three skills linked to DEX — Acrobatics, Sleight of Hand, and Stealth — are all extremely useful in exploration and combat. DEX saving throws protect against the most common damage type in the game: area-of-effect spells like Fireball, breath weapons, and trap explosions.
Constitution (CON) — The Universal Stat
Constitution is the only ability score that every class benefits from equally. Your CON modifier adds to your maximum Hit Points at every single level — so a level 20 character with +3 CON has 60 more HP than the same character with +0 CON. Constitution saving throws trigger on Concentration spells (which maintain powerful ongoing magical effects), poison, disease, and many high-level magical attacks. No skill is directly tied to CON, but its impact on HP and Concentration makes it the second most important stat for most builds.
💡 Never Dump CON: Even "dump stat" candidates for CON carry real cost. A Wizard with 8 CON (−1 modifier) loses 20 HP over 20 levels compared to CON 10, AND fails Concentration saves far more frequently, losing the powerful ongoing spell effects that make Wizards dominant. Aim for at least CON 12–14 on every build.
Intelligence (INT) — The Scholar's Stat
Intelligence governs five skills — Arcana, History, Investigation, Nature, and Religion — and is the primary spellcasting stat for Wizards and Artificers. Investigation (INT) is one of the most frequently used non-combat checks in the game, used to search rooms, examine evidence, identify traps, and find hidden objects. INT saving throws protect against Feeblemind and various enchantment spells. Most non-Wizard/Artificer classes safely dump INT, accepting the −1 to knowledge checks as a fair trade for other stats.
Wisdom (WIS) — The Perception Powerhouse
Wisdom governs five skills including Perception — the most frequently called-upon skill in all of D&D 5e. Perception checks determine whether you notice enemies, traps, hidden doors, or lying NPCs. WIS is the primary casting stat for Clerics, Druids, and Rangers, and adds to Monk Unarmored Defense (AC = 10 + DEX + WIS). Most critically, WIS saving throws protect against Charm, Fear, Dominate Person, Hold Person, and Hypnotic Pattern — the most game-changing crowd control effects in the game.
Charisma (CHA) — Social Force and Arcane Power
Charisma covers all social skills (Persuasion, Deception, Intimidation, Performance) and is the primary casting stat for Bards, Paladins, Sorcerers, and Warlocks. CHA is essential for any "face of the party" role — the character who leads negotiations, gathers information, and navigates social encounters. Mechanically, the Paladin's level-6 Aura of Protection adds the Paladin's CHA modifier to every saving throw for every ally within 10 feet — making CHA a party-wide defensive stat of enormous value.