D&D 5e Spell Slot Calculator

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D&D 5e Spell Slot Calculator

Calculate your available spell slots based on your class and character level using official D&D 5e rules.

Spellcasting Class

Wizard Sorcerer Cleric Druid Bard

Paladin Ranger

Fighter (Eldritch Knight) Rogue (Arcane Trickster)

Warlock

Class Level (1–20)

Include Multiclass? (Optional)

No Multiclass + Wizard + Sorcerer + Cleric + Druid + Bard + Paladin + Ranger + Eldritch Knight + Arcane Trickster

Multiclass Level (1–20)

Calculate Spell Slots Enter your class and level, then click Calculate.

(function() {

// ── Spell Slot Tables (PHB p.165) ────────────────────────────────────────── // Full caster: indexed by caster level 1–20, values = [1st,2nd,3rd,4th,5th,6th,7th,8th,9th] const FULL_CASTER_SLOTS = [ [2,0,0,0,0,0,0,0,0], // 1 [3,0,0,0,0,0,0,0,0], // 2 [4,2,0,0,0,0,0,0,0], // 3 [4,3,0,0,0,0,0,0,0], // 4 [4,3,2,0,0,0,0,0,0], // 5 [4,3,3,0,0,0,0,0,0], // 6 [4,3,3,1,0,0,0,0,0], // 7 [4,3,3,2,0,0,0,0,0], // 8 [4,3,3,3,1,0,0,0,0], // 9 [4,3,3,3,2,0,0,0,0], // 10 [4,3,3,3,2,1,0,0,0], // 11 [4,3,3,3,2,1,0,0,0], // 12 [4,3,3,3,2,1,1,0,0], // 13 [4,3,3,3,2,1,1,0,0], // 14 [4,3,3,3,2,1,1,1,0], // 15 [4,3,3,3,2,1,1,1,0], // 16 [4,3,3,3,2,1,1,1,1], // 17 [4,3,3,3,3,1,1,1,1], // 18 [4,3,3,3,3,2,1,1,1], // 19 [4,3,3,3,3,2,2,1,1], // 20 ];

// Half caster: indexed by class level 1–20 (levels 1 get no slots) const HALF_CASTER_SLOTS = [ [0,0,0,0,0,0,0,0,0], // 1 [2,0,0,0,0,0,0,0,0], // 2 [3,0,0,0,0,0,0,0,0], // 3 [3,0,0,0,0,0,0,0,0], // 4 [4,2,0,0,0,0,0,0,0], // 5 [4,2,0,0,0,0,0,0,0], // 6 [4,3,0,0,0,0,0,0,0], // 7 [4,3,0,0,0,0,0,0,0], // 8 [4,3,2,0,0,0,0,0,0], // 9 [4,3,2,0,0,0,0,0,0], // 10 [4,3,3,0,0,0,0,0,0], // 11 [4,3,3,0,0,0,0,0,0], // 12 [4,3,3,1,0,0,0,0,0], // 13 [4,3,3,1,0,0,0,0,0], // 14 [4,3,3,2,0,0,0,0,0], // 15 [4,3,3,2,0,0,0,0,0], // 16 [4,3,3,3,1,0,0,0,0], // 17 [4,3,3,3,1,0,0,0,0], // 18 [4,3,3,3,2,0,0,0,0], // 19 [4,3,3,3,2,0,0,0,0], // 20 ];

// Third caster: indexed by class level 1–20 const THIRD_CASTER_SLOTS = [ [0,0,0,0,0,0,0,0,0], // 1 [0,0,0,0,0,0,0,0,0], // 2 [2,0,0,0,0,0,0,0,0], // 3 [3,0,0,0,0,0,0,0,0], // 4 [3,0,0,0,0,0,0,0,0], // 5 [3,0,0,0,0,0,0,0,0], // 6 [4,2,0,0,0,0,0,0,0], // 7 [4,2,0,0,0,0,0,0,0], // 8 [4,2,0,0,0,0,0,0,0], // 9 [4,3,0,0,0,0,0,0,0], // 10 [4,3,0,0,0,0,0,0,0], // 11 [4,3,0,0,0,0,0,0,0], // 12 [4,3,2,0,0,0,0,0,0], // 13 [4,3,2,0,0,0,0,0,0], // 14 [4,3,2,0,0,0,0,0,0], // 15 [4,3,3,0,0,0,0,0,0], // 16 [4,3,3,0,0,0,0,0,0], // 17 [4,3,3,0,0,0,0,0,0], // 18 [4,3,3,1,0,0,0,0,0], // 19 [4,3,3,1,0,0,0,0,0], // 20 ];

// Warlock Pact Magic: [slots, slot_level] indexed by class level 1–20 const WARLOCK_PACT = [ [1,1],[2,1],[2,2],[2,2],[2,3], [2,3],[2,4],[2,4],[2,5],[2,5], [3,5],[3,5],[3,5],[3,5],[3,5], [3,5],[4,5],[4,5],[4,5],[4,5] ];

// Multiclass spell slot table (PHB p.165) // Indexed by total caster level 1–20 const MULTICLASS_SLOTS = FULL_CASTER_SLOTS; // same table

function getCasterType(cls) { if (['wizard','sorcerer','cleric','druid','bard'].includes(cls)) return 'full'; if (['paladin','ranger'].includes(cls)) return 'half'; if (['eldritch_knight','arcane_trickster'].includes(cls)) return 'third'; if (cls === 'warlock') return 'warlock'; return 'none'; }

function getCasterLevel(cls, classLevel) { const type = getCasterType(cls); if (type === 'full') return classLevel; if (type === 'half') return Math.floor(classLevel / 2); if (type === 'third') return Math.floor(classLevel / 3); return 0; // warlock handled separately }

function getSlots(cls, level) { const type = getCasterType(cls); if (type === 'full') return FULL_CASTER_SLOTS[level - 1].slice(); if (type === 'half') return HALF_CASTER_SLOTS[level - 1].slice(); if (type === 'third') return THIRD_CASTER_SLOTS[level - 1].slice(); return null; }

function getSpellsKnownOrPrepared(cls, level) { const notes = { wizard: Spells in Spellbook: Starts with 6 + INT modifier; gains 2 per level. Prepared: INT modifier + Wizard level (min 1)., sorcerer: Spells Known: Fixed by level (2 at 1st, up to 15 at 20th). No preparation needed., cleric: Prepared: WIS modifier + Cleric level (min 1). Access to entire Cleric spell list., druid: Prepared: WIS modifier + Druid level (min 1). Access to entire Druid spell list., bard: Spells Known: Fixed by level (4 at 1st, up to 22 at 20th). No preparation needed., paladin: Prepared: CHA modifier + half Paladin level (min 1). Access to entire Paladin spell list., ranger: Spells Known: Fixed by level (2 at 2nd, up to 11 at 20th). No preparation needed., eldritch_knight: Spells Known: Fixed by level (3 at 3rd, up to 13 at 20th). Mostly Abjuration & Evocation., arcane_trickster: Spells Known: Fixed by level (3 at 3rd, up to 13 at 20th). Mostly Enchantment & Illusion., warlock: Spells Known: Fixed by level (2 at 1st, up to 15 at 20th). All slots are Pact Magic slots., }; return notes[cls] || ''; }

window.dndUpdateSubclass = function() { const cls = document.getElementById('d-d-class').value; const mcGroup = document.getElementById('d-d-multiclass-level-group'); const mc = document.getElementById('d-d-multiclass').value; mcGroup.style.display = (mc !== 'none') ? 'block' : 'none'; };

document.getElementById('d-d-multiclass').addEventListener('change', function() { const mcGroup = document.getElementById('d-d-multiclass-level-group'); mcGroup.style.display = (this.value !== 'none') ? 'block' : 'none'; });

window.dndCalc = function() { const resultEl = document.getElementById('d-d-result'); const cls = document.getElementById('d-d-class').value; const levelRaw = parseInt(document.getElementById('d-d-level').value); const mc = document.getElementById('d-d-multiclass').value; const mcLevelRaw = parseInt(document.getElementById('d-d-multiclass-level').value) || 0;

// ── Validation ──────────────────────────────────────────────────────────── if (isNaN(levelRaw) || levelRaw 20) { resultEl.innerHTML = '⚠ Class level must be between 1 and 20.'; return; } if (mc !== 'none' && (isNaN(mcLevelRaw) || mcLevelRaw 20)) { resultEl.innerHTML = '⚠ Multiclass level must be between 1 and 20.'; return; } if (mc !== 'none' && mc === cls) { resultEl.innerHTML = '⚠ Multiclass cannot be the same as your primary class.'; return; } if (mc !== 'none' && levelRaw + mcLevelRaw > 20) { resultEl.innerHTML = '⚠ Total character level cannot exceed 20.'; return; }

const classNames = { wizard:'Wizard', sorcerer:'Sorcerer', cleric:'Cleric', druid:'Druid', bard:'Bard', paladin:'Paladin', ranger:'Ranger', eldritch_knight:'Eldritch Knight', arcane_trickster:'Arcane Trickster', warlock:'Warlock' };

let html = '';

// ── Warlock (Pact Magic) ────────────────────────────────────────────────── if (cls === 'warlock' && mc === 'none') { const [numSlots, slotLevel] = WARLOCK_PACT[levelRaw - 1]; const ordinals = ['','1st','2nd','3rd','4th','5th']; html += ### Warlock — Level ${levelRaw}; html += `Pact Magic Slots: ${numSlots} slot${numSlots > 1 ? 's' : ''} at ${ordinals[slotLevel]} level

; html +=Pact Magic slots are regained on a Short or Long Rest.

; html +=${getSpellsKnownOrPrepared(cls, levelRaw)}

`; resultEl.innerHTML = html; return; }

// ── Single Class (non-Warlock) ──────────────────────────────────────────── if (mc === 'none') { const slots = getSlots(cls, levelRaw); const ordinals = ['1st','2nd','3rd','4th','5th','6th','7th','8th','9th']; html += ### ${classNames[cls]} — Level ${levelRaw}; html += ; html +=; ordinals.forEach(o => { html += ${o}; }); html += ; slots.forEach(s => { const bg = s > 0 ? '#eaf4fb' : '#f5f5f5'; const fw = s > 0 ? 'bold' : 'normal'; const color = s > 0 ? '#2c3e50' : '#bbb'; html += `${s > 0 ? s : '—'}`; }); html +=; const totalSlots = slots.reduce((a,b) => a+b, 0); html += `Total Spell Slots: ${totalSlots}

; html +=All spell slots are regained on a Long Rest.

; html +=${getSpellsKnownOrPrepared(cls, levelRaw)}

`; resultEl.innerHTML = html; return; }

// ── Multiclass ──────────────────────────────────────────────────────────── // Warlock multiclass: Pact Magic slots are separate; other slots use multiclass table let warlockSlots = null; let warlockLevel = 0; let primaryCasterLevel = 0; let mcCasterLevel = 0;

if (cls === 'warlock') { warlockLevel = levelRaw; warlockSlots = WARLOCK_PACT[levelRaw - 1]; mcCasterLevel = getCasterLevel(mc, mcLevelRaw); primaryCasterLevel = 0; // warlock doesn't contribute to multiclass table } else if (mc === 'warlock') { warlockLevel = mcLevelRaw; warlockSlots = WARLOCK_PACT[mcLevelRaw - 1]; primaryCasterLevel = getCasterLevel(cls, levelRaw); mcCasterLevel = 0; } else { primaryCasterLevel = getCasterLevel(cls, levelRaw); mcCasterLevel = getCasterLevel(mc, mcLevelRaw); }

const totalCasterLevel = primaryCasterLevel + mcCasterLevel; const ordinals = ['1st','2nd','3rd','4th','5th','6th','7th','8th','9th'];

html += ### Multiclass: ${classNames[cls]} ${levelRaw} / ${classNames[mc]} ${mcLevelRaw};

// Multiclass spell slots if (totalCasterLevel > 0) { const clampedLevel = Math.min(Math.max(totalCasterLevel, 1), 20); const mcSlots = MULTICLASS_SLOTS[clampedLevel - 1]; html += `Combined Caster Level: ${clampedLevel}

; html += ``; html += ``; ordinals.forEach(o => { html +=${o}; }); html += ``; mcSlots.forEach(s => { const bg = s > 0 ? '#eaf4fb' : '#f5f5f5'; const fw = s > 0 ? 'bold' : 'normal'; const color = s > 0 ? '#2c3e50' : '#bbb'; html +=${s > 0 ? s : '—'}; }); html += ``; const totalSlots = mcSlots.reduce((a,b) => a+b, 0); html +=Total Spell Slots: ${totalSlots} (regained on Long Rest)

; } else { html +=No combined spell slots (neither class contributes to the multiclass table at these levels).

`; }

// Warlock Pact Magic (separate) if (warlockSlots) { const [numSlots, slotLevel] = warlockSlots; const ordinalNames = ['','1st','2nd','3rd','4th','5th']; html += `Pact Magic Slots (Warlock ${warlockLevel}): ${numSlots} slot${numSlots>1?'s':''} at ${ordinalNames[slotLevel]} level — regained on Short or Long Rest.

; html +=Pact Magic slots are tracked separately from regular spell slots but can be used to cast spells from either class.

`; }

// Caster level breakdown html += `; html +=Caster Level Breakdown:; if (cls !== 'warlock') { const type = getCasterType(cls); const divisor = type === 'full' ? 1 : type === 'half' ? 2 : 3; html +=${classNames[cls]} ${levelRaw} → ${primaryCasterLevel} caster level${divisor>1?' (÷'+divisor+')':''}; } if (mc !== 'warlock') { const type = getCasterType(mc); const divisor = type === 'full' ? 1 : type === 'half' ? 2 : 3; html +=${classNames[mc]} ${mcLevelRaw} → ${mcCasterLevel} caster level${divisor>1?' (÷'+divisor+')':''}; } html +=

`;

resultEl.innerHTML = html; };

})();

#### Formula

Single Class (Full Caster): Spell slots are read directly from the class table (PHB p.114–163). Full casters include Wizard, Sorcerer, Cleric, Druid, and Bard.

Half Casters (Paladin, Ranger): Effective caster level = ⌊Class Level ÷ 2⌋. Slots are read from the half-caster table.

Third Casters (Eldritch Knight, Arcane Trickster): Effective caster level = ⌊Class Level ÷ 3⌋. Slots begin at class level 3.

Warlock (Pact Magic): Uses a separate Pact Magic system. Slots are determined by Warlock level and are all of the same level. Regained on Short or Long Rest.

Multiclass Spell Slots (PHB p.165): Total Caster Level = (Full caster levels × 1) + (Half caster levels ÷ 2, rounded down) + (Third caster levels ÷ 3, rounded down). Spell slots are then read from the full caster table using the Total Caster Level. Warlock Pact Magic slots are tracked separately and added on top.

#### Assumptions & References

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